The short version
Braid is thin and does not stretch, so it casts far and tells you everything. Fluorocarbon sinks, resists rock and is harder for fish to see than nylon, but it is stiff and unforgiving of a badly tied knot. Monofilament stretches, is only a little denser than water, ties easily and costs the least. Most spinning-rod anglers in our region end up on braid with a fluorocarbon leader, and that system has its own page at /line/line-systems/. This page is about the materials themselves, because you cannot choose a system until you know what each material does.
If you fish a fly rod, the fly line is a different animal entirely. It is covered in its own section near the end, and the leader and tippet that do the actual fishing are on /line/leaders-and-tippet/.
Basis: consensus; editorial on the framing; mono's density per Sunline's material chart (specific gravity 1.14 against water's 1.00), read 30 October 2026
Float, sink and stretch: the makers' answers
These are the questions anglers type in most often. Each answer below is what a line maker prints on its own pages, read on 30 October 2026, with the figures exactly as the maker gives them. Specific gravity is weight against the same volume of water: water is 1.00, so a line above 1.00 is denser than water and a line below it floats.
Does fluorocarbon sink or float?
It sinks. Sunline gives fluorocarbon a specific gravity of 1.78, "fast sinking speed," against 1.00 for water, and Kureha, whose group makes Seaguar, says "High specific gravity provides quick sinking speed."
Basis: official (Sunline material chart and Jun Keiryu Fluoro page; Kureha's Seaguar page)
Does monofilament float or sink?
By the material figure it is a little denser than water: Sunline lists nylon at a specific gravity of 1.14, "some variation depending on the type of nylon," against 1.00 for water and 1.78 for fluorocarbon. How a given mono behaves on the water in use, and whether it stays on the surface long enough for a topwater lure, no maker page we could open this run states: Status pending.
Basis: official on the specific gravity (Sunline material chart); in-use behaviour Status pending
Does braided line sink or float?
Standard braid floats: Sunline lists polyethylene (PE) braid at a specific gravity of 0.97 and writes "floats." Not every braid is standard PE: the same chart lists PE with polyester at 1.05 and PE with a high-gravity fibre at 1.1 to 1.24, both above water's 1.00. Whether a particular brand such as Spiderwire, PowerPro or J-Braid floats is Status pending; we could not open those makers' pages this run.
Basis: official (Sunline material chart); brand-by-brand buoyancy Status pending
Does fluorocarbon stretch?
Yes, a little less than nylon. Sunline says fluorocarbon has "slightly less stretch than nylon. Low initial stretch means better sensitivity," and Kureha calls Seaguar "Less elastic than nylon, making it easier to sense strikes." Sunline describes nylon's stretch as "moderate stretch absorbs shock. High initial stretch" and braid's as "Minimal." None of the makers we read prints a stretch percentage, so the figures are Status pending; the third-party numbers are in the Stretch section below.
Basis: official (Sunline material chart; Kureha's Seaguar page); percentages Status pending
Abrasion, knots and visibility in the makers' words
- Abrasion. Sunline: nylon's "Soft surface is vulnerable to scratches and damage"; fluorocarbon's "Hard surface is resistant to scratches and damage"; PE braid's "Ultrathin filaments are easily damaged by friction." Sufix sells its 832 braid on "Ultimate Abrasion Resistance" from a GORE fibre woven in with seven HMPE fibres. The makers disagree on braid, and a bench test below disagrees with the marketing on fluorocarbon.
- Knot strength. Sunline prints knot strength as a share of straight strength: nylon "Approx. 85%," fluorocarbon "Approx. 70%," PE braid "Approx. 40%." Those are Sunline's figures for its own materials, and the text we read does not name the knot used. Kureha claims "Extremely high tensile strength and knot strength" for Seaguar without a figure.
- Visibility. Sunline gives refractive index 1.53 for nylon and 1.42 for fluorocarbon, "nearly invisible in water due to the refractive index being close to that of water (1.33)." Kureha says Seaguar's refractive index "extremely close to that of water reduces visibility in water." Neither prints a figure for braid. What those numbers do and do not prove is in the Visibility section below.
- Water. Sunline: nylon absorbs water ("diameter and stretch increase with water absorption"); fluorocarbon and PE braid do not.
Basis: official (Sunline material chart; Sufix 832 product page; Kureha's Seaguar page)
What the makers' pages did not settle
- Berkley, Spiderwire, PowerPro, P-Line and Daiwa: their own pages refused or failed to load on 30 October 2026, so what each says about its lines floating or sinking is Status pending.
- Whether ordinary mono floats in use, given a specific gravity above water's: Status pending.
- A stretch percentage from any maker: Status pending.
Basis: record of what could and could not be read on 30 October 2026
What each material is
Monofilament is a single extruded strand of nylon. It has been the default line for most of the sport's history. It absorbs a small amount of water in use, which makes it more supple but also weaker over a long day, and it degrades with ultraviolet light. Manufacturers rate it in pound test and sell it from roughly 2 to 30 lb for freshwater.
Fluorocarbon is a single extruded strand of polyvinylidene fluoride (PVDF). It is denser than water and than nylon, so it sinks. It absorbs very little water, is more resistant to UV, and lasts longer on the spool. Seaguar, which invented the category, states plainly that fluorocarbon "is usable over a much longer period of time than nylon monofilaments." It is also stiffer than nylon at a given diameter, which is what makes it awkward on a small spinning spool, and it is the most expensive of the three per yard.
Braid is not a single strand. It is four, eight or more fibers of ultra-high-molecular-weight polyethylene (sold as Spectra or Dyneema) woven into a rope. Berkley describes it as "strands of ultra-high molecular weight polyethylene (UHMWPE)." The fiber is far stronger per diameter than nylon, which is why 20 lb braid is thinner than 8 lb mono. It has almost no stretch, floats, is opaque (fish can see it, so can you), and has very little memory — Berkley rates it "Low." It is also the line most likely to outlast the reel it is on.
Basis: official (Seaguar, Berkley); consensus on cost and longevity
The properties that decide the choice
Line marketing leans on a few words: invisible, sensitive, tough. What actually decides which line goes on which reel is a longer list, and some of it cuts against the marketing.
Stretch
Braid stretches least, fluorocarbon a little more, nylon the most. That ordering is agreed on by every manufacturer we read. The numbers are not. Berkley calls braid "virtually no stretch" and mono "forgiving stretch under pressure." One angling article puts working stretch (the stretch you feel while fishing, not at the breaking point) at 2–9 percent for mono, 1–4 percent for fluoro and under 1 percent for braid, with mono stretching 25–35 percent at the point of breaking. Another article quotes a manufacturer's figure of 25 percent average stretch for fluorocarbon against 28 percent for mono and calls the difference "nearly indiscernible." Those two sources are measuring different things, and neither shows its method, so treat the ranking as reliable and the percentages as illustrations.
What stretch means on the water: no stretch is why braid transmits a bluegill peck through 80 feet of line, and why a hookset on braid arrives instantly. It is also why a hard-pulling fish next to a kayak can tear a hook out on braid, and why a shock-absorbing leader or a softer rod matters. Mono's stretch is a feature with treble-hooked lures and with beginners, because it forgives.
Basis: official on the ranking; consensus on the working numbers, which vary by source
Diameter for a given test
This is the property that quietly drives everything else. Thinner line casts farther, cuts current better, and lets a light lure sink faster and swim more freely. Braid is dramatically thinner than nylon or fluorocarbon at the same rated strength. A published comparison chart attributed to Berkley Trilene and Berkley Vanish (mono and fluoro) and Spiderwire Stealth (braid) shows 10 lb mono and fluoro at 0.011 in and 10 lb braid at 0.008 in; 20 lb mono and fluoro at 0.016 in against 20 lb braid at 0.010 in. Sufix publishes 10 lb 832 braid at 0.008 in and 20 lb at 0.009 in, which is roughly the diameter of 6–8 lb mono.
Two warnings. Pound test ratings on braid are conservative by convention: a lab test of 15 lb Spiderwire braid broke it at 34.4 lb on average, and 50 lb braid at 62.8 lb. And diameter for fluorocarbon and nylon is essentially the same at the same test, so the two are interchangeable in the diameter column and differ only in the other properties below.
Basis: official (Sufix spec, Sport Fishing lab test); the Berkley/Spiderwire chart is from a third-party compilation
Visibility, and what the refractive-index claim actually says
Fluorocarbon's headline claim is that it is nearly invisible underwater because its refractive index is close to water's. The numbers are real. Seaguar publishes them: water 1.33, fluorocarbon 1.42, nylon 1.62. Other published figures put nylon at about 1.52–1.53; the exact nylon figure varies by source and by nylon grade, but fluorocarbon is closer to water in every version.
The claim that follows from the numbers is weaker than the marketing. Closer is not equal. A 0.09 gap from water still bends light. A round strand of anything transparent also acts as a cylindrical lens and produces a bright line along its length regardless of index, and fish that can detect polarized light have a channel that index-matching does nothing for. Seaguar's own product copy is careful here: InvizX is described as "significantly less visible underwater than monofilament and coated lines," which is a comparison, not an invisibility claim. We could not find a controlled test showing fish catch rates differ between fluorocarbon and nylon of the same diameter. The honest summary is that fluorocarbon is harder to see than nylon, that diameter matters at least as much as material, and that nobody has proven the difference matters to a bass.
Braid is opaque and visible in any color. Whether that costs bites is the central argument of the leader system; see the systems page.
Basis: official on the refractive indices (Seaguar); editorial on what the numbers mean; the fish-behavior effect is unresolved
Sink rate
Fluorocarbon sinks. Nylon is close to neutral and slowly takes on water. Standard braid floats. Every manufacturer we read agrees on those three, with one addition: Sunline also lists braids built with polyester or a high-gravity fibre at specific gravities above water's (the figures are in the makers' answers above). The practical consequence is that a fluorocarbon leader helps a light bait get down and stay down, a floating braid main line pulls a light bait upward on a long cast, and mono is the natural choice for topwater lures and for a slip-float rig where you want the line on the surface.
Basis: official (Seaguar, Berkley, Wired2Fish; Sunline material chart for the heavier braids, read 30 October 2026)
Abrasion resistance
Here the marketing and the testing part ways. Fluorocarbon is sold as far more abrasion resistant than nylon. A bench test published by On The Water dragged 20 lb and 25 lb samples of five brands over 80-grit sandpaper: 20 lb Ande fluorocarbon broke after 74 pulls on average against 82 for the same brand's mono, and at matched diameter (0.018 in) the fluoro and mono samples "all broke at nearly equal levels." The author's conclusion was that diameter, not material, is what protects you. Another angling review reaches the same place and says nylon is "diameter for diameter, generally the most abrasion-resistant choice," while flagging that it is one test, not science.
The usual view is that braid is the most abrasion resistant per pound test because it is a bundle of tough fibers rather than a single strand, which is why it is the choice for grass and heavy wood. Not every maker says so: Sunline's material chart says PE braid's "Ultrathin filaments are easily damaged by friction," while Sufix sells its 832 on "Ultimate Abrasion Resistance." Braid is also the line that frays visibly and should be checked. Fluorocarbon keeps its strength longer than nylon once nicked because it does not absorb water into the damage. For a rock-bottom smallmouth creek, the practical answer is: go up in diameter, whatever the material, and re-tie when you feel roughness.
Basis: the makers disagree on braid (Sunline, Sufix, both read 30 October 2026); the fluoro-versus-nylon question is disputed and we show both
Knot behavior
Nylon is the easiest of the three to knot. Berkley's own comparison chart rates mono knot tying "Easy" and fluorocarbon "Medium." Fluorocarbon is stiff and heat-sensitive: a knot cinched dry generates friction heat that weakens the strand, and coil memory can keep the wraps from seating. Wet every fluorocarbon knot before tightening and pull it down slowly. Braid is slick, so knots that rely on friction slip unless they have enough wraps; the Palomar is the standard terminal knot for braid and fluorocarbon alike, and it is on /knots/palomar/.
Basis: official (Berkley chart); consensus on wetting and heat
Memory
Berkley's chart rates nylon "High" for memory, fluorocarbon "Medium" and braid "Low" — nylon, not fluorocarbon, is the line that holds a coil hardest. Braid comes off the spool without a set; nylon takes one on a spinning reel over a season.
Fluorocarbon sits between the two on memory, but it is the stiffer of the two at a given diameter, and stiffness is what makes a cheap fluorocarbon spring off a small spinning spool in loose coils. That is the reason straight fluorocarbon on spinning gear is a step most anglers take only with a soft, purpose-made line and a leader-length that suits — the stiffness, not a higher memory rating than nylon.
Basis: official (Berkley chart, memory row re-read from the source 23 September 2026); stiffness per Home Waters Club; consensus on the spinning-spool behaviour
UV, water absorption and longevity
Nylon absorbs water and weakens over a day (Berkley: "can also ultimately weaken the line") and degrades under UV. Fluorocarbon absorbs almost none and is UV resistant. Braid does not absorb water either and is largely unaffected by sun, though its coating and color fade. Replace nylon at least every season on a reel that sees regular use, fluorocarbon roughly yearly, and braid when it frays or looks fuzzy, which for a light-tackle reel can be years.
Basis: official (Berkley, Seaguar); editorial on replacement intervals
Cost
Per yard, nylon is cheapest, fluorocarbon most expensive, braid in the middle. Per season, braid is the cheapest because it stays on the reel longest, and the fluorocarbon you use as a leader is bought in small spools and used a few feet at a time.
Basis: consensus
The three compared
- Construction. Monofilament (nylon): Single strand · Fluorocarbon (PVDF): Single strand · Braid (UHMWPE): Woven fibers, 4–8+ carriers
- Stretch. Monofilament (nylon): Most · Fluorocarbon (PVDF): Less · Braid (UHMWPE): Almost none
- Diameter at 10 lb test. Monofilament (nylon): About 0.011 in · Fluorocarbon (PVDF): About 0.011 in · Braid (UHMWPE): About 0.008 in
- Diameter at 20 lb test. Monofilament (nylon): About 0.016 in · Fluorocarbon (PVDF): About 0.016 in · Braid (UHMWPE): About 0.009–0.010 in
- Refractive index. Monofilament (nylon): 1.52–1.62 by source · Fluorocarbon (PVDF): 1.42 · Braid (UHMWPE): Opaque
- Sinks or floats. Monofilament (nylon): Near neutral, slow sink · Fluorocarbon (PVDF): Sinks · Braid (UHMWPE): Floats (standard PE)
- Abrasion resistance. Monofilament (nylon): Good at diameter · Fluorocarbon (PVDF): Good at diameter; disputed vs nylon · Braid (UHMWPE): Best per pound test
- Knot tying. Monofilament (nylon): Easiest · Fluorocarbon (PVDF): Hardest; wet every knot · Braid (UHMWPE): Slick; needs wrap-heavy knots
- Memory. Monofilament (nylon): High · Fluorocarbon (PVDF): Medium · Braid (UHMWPE): Low (Berkley's chart wording)
- Water absorption. Monofilament (nylon): Yes, weakens wet · Fluorocarbon (PVDF): Very little · Braid (UHMWPE): None
- UV resistance. Monofilament (nylon): Poor · Fluorocarbon (PVDF): Good · Braid (UHMWPE): Good
- Cost per yard. Monofilament (nylon): Lowest · Fluorocarbon (PVDF): Highest · Braid (UHMWPE): Middle
- Usual freshwater range. Monofilament (nylon): 2–25 lb · Fluorocarbon (PVDF): 6–20 lb · Braid (UHMWPE): 10–65 lb
Diameters are typical published figures for mainstream lines and vary by maker; the AFFTA-style standardization that exists for fly line does not exist for conventional line diameters.
Basis: official for the diameter and refractive-index entries; consensus for the rest
Where each material wins
By technique
- Braid main line: every finesse presentation on spinning gear when paired with a leader (/techniques/ned-rig/, /techniques/drop-shot/, /techniques/shaky-head/, /techniques/wacky-rig/); topwater and frogs straight; jigs and Texas rigs in grass and wood; anything that needs a long cast.
- Fluorocarbon, straight or as leader: the leader in nearly every braid system; straight line for clear-water finesse on a spinning reel, jigs and /techniques/texas-rig/ on casting gear in wood cover, and treble-hooked baits that need to run deep. Wired2Fish's reasoning for treble hooks is that fluoro's small stretch "helps prevent hooks from pulling."
- Monofilament: topwater lures, where its stretch helps; /techniques/slip-float/ rigs for /fish/crappie/ and /fish/bluegill/; a beginner's first spool of anything; and as a leader under a float where you want it on the surface.
Basis: consensus; editorial on the ranking
By environment
Rivers and creeks. Current, rock and clear water together. Braid's thin diameter cuts current and its sensitivity tells you whether that tick was a rock or a smallmouth. Rock argues for a heavier-than-clarity-suggests fluorocarbon leader. Straight mono gets pushed around by current more than braid of the same strength because it is thicker. This is the water where the braid-to-fluoro system earns its keep; see /fish/smallmouth-bass/.
Reservoirs. Depth and open water. Deep presentations favor fluorocarbon's sink rate; braid floats and lifts a bait on a long cast unless a leader is fishing under it. Long casts to schooling fish favor braid. Grass and timber (Cave Run, Taylorsville) favor braid for the cutting power.
Tailwaters. Cold, clear, sometimes fast. Trout below a dam see a lot of line. The finest fluorocarbon or nylon that will land the fish, and the smallest-diameter braid if you run braid at all. Our tailwater page is /waterways/cumberland-river-tailwater/.
Ponds. Forgiving. Mono does everything here for panfish and largemouth; braid to a leader if the pond has grass or you want to skip the season-end respool.
Basis: consensus; editorial
The moving-water and kayak angle
A kayak puts the reel eighteen inches off the water and you in a seat you cannot leave to sort out a mess. Three things change.
Line management. Braid on a spinning reel lies flat and resists twist, which matters when a drop-shot weight is spinning in current beside the boat. Fluorocarbon and old mono spring off the spool in coils that end up around a paddle shaft. If you run straight fluorocarbon in a kayak, run a supple line and do not overfill the spool.
Current and rock. A drifting kayak and a bait dragging across a ledge means constant abrasion on the last few feet of line. That is the argument for a leader you can cut back and re-tie in the seat, rather than a main line you have to nurse for a season.
Visibility for the angler. A high-visibility yellow or white braid is easy to watch against dark creek water for the tick of a bite on the fall. The fish see the leader, not the braid, if the leader is long enough. This is the whole logic of the system on /line/line-systems/.
Basis: consensus; editorial
Fly line is not a fishing line in this sense
A fly line is a level, tapered, plastic-coated core whose only job is to carry the weight that loads the rod and delivers the fly. Scientific Anglers puts it in one sentence: "in fly casting we are throwing the weight of the line and our lure, the fly, just goes along for the ride." The industry standard (AFFTA) defines a line's weight by the grain weight of its first 30 feet, so a 5-weight line targets 140 grains within a 134–146 range. Nothing about a fly line's material choice concerns stretch, visibility to fish, or knot strength in the sense this page has been discussing, because the fly line stops well short of the fly.
What does the fishing on a fly rod is the leader and tippet: a tapered nylon or fluorocarbon leader looped to the fly line, with a tippet section at the end that carries the fly. The same material questions from this page (nylon versus fluorocarbon, sink, stiffness, visibility) apply to tippet, and are covered on /line/leaders-and-tippet/. The complete fly system is laid out on /line/line-systems/.
Basis: official (Scientific Anglers, AFFTA weight table)
What to spool
Beginner
One spinning reel, 2500 size, spooled with 10 lb braid and a 6–8 ft leader of 8 lb fluorocarbon tied on with a double uni knot (/knots/uni/), Palomar to the lure. This one setup fishes a Ned rig, a shaky head, a wacky rig, a small jig and a slip float for the whole region, with the fewest things to learn. If you would rather avoid the leader knot for the first season, spool 8 lb monofilament straight and accept shorter casts and a yearly respool. Do not start on straight fluorocarbon; the coils will put you off fishing.
Basis: consensus; editorial on the recommendation
Intermediate
Add the situational choices. Braid to fluoro remains the spinning default, with leader test and length set by water clarity and rock (the pairings table is on the systems page). Add a casting reel spooled with 15 lb fluorocarbon for jigs and Texas rigs in wood — 17 to 20 lb in heavier cover — and for treble-hook baits, and a second spinning reel or a spare spool of 8 lb mono for topwater and floats. Learn the Alberto (/knots/alberto/) to replace the double uni; it passes through the guides better.
Basis: consensus; editorial
Advanced
Decisions by depth, cover, clarity and current, not by reel. Clear tailwater or a gin-clear September creek: straight 6 lb fluorocarbon or a 10–12 ft leader of 6 lb on 10 lb braid. Rock and current at moderate clarity: braid with a shorter, heavier fluoro leader, 10–12 lb, cut back often. Grass and mats: 40–65 lb braid straight. Deep reservoir bottom contact: 12–17 lb fluorocarbon straight or a long fluoro leader on 20–30 lb braid, because floating braid lifts a bait off the bottom on a long cast. Topwater in any water: mono or braid, never fluoro, because it sinks and drowns the lure's action. Fly rod in the same waters: the leader and tippet page.
Basis: consensus; editorial
Regulations and official information
Nothing about line choice is regulated for the waters on this site as far as we know, but tackle rules do exist on some waters and change. Check the Kentucky Department of Fish and Wildlife Resources fishing and boating guide for the water you are fishing before you go: KDFWR Fishing and Boating Guide.
Basis: official (link only)
Sources and how confident we are
How confident we are
| Section | Basis |
|---|---|
| Float, sink and stretch answers | Official (Sunline, Kureha for Seaguar, Sufix); brand-by-brand buoyancy and stretch percentages Status pending |
| What each material is | Official; consensus on cost |
| Stretch | Official on ranking; numbers vary by source |
| Diameter | Official (Sufix spec, lab test); third-party chart for Berkley/Spiderwire |
| Visibility | Official on refractive indices; effect on fish unresolved |
| Sink rate | Official |
| Abrasion | Disputed between marketing and bench tests, and between makers on braid; both shown |
| Knots, memory, UV, cost | Official and consensus |
| Where each wins | Consensus; editorial |
| Kayak angle | Consensus; editorial |
| Fly line section | Official |
| What to spool | Editorial |
Sources
- Material — Sunline — read 30 October 2026: specific gravity nylon 1.14, fluorocarbon 1.78 ("fast sinking speed"), PE braid 0.97 ("floats"), PE with polyester 1.05, PE with high-gravity fibre 1.1–1.24; stretch, abrasion, water absorption and refractive index (nylon 1.53, fluorocarbon 1.42, water 1.33) by material; knot strength nylon about 85 percent, fluorocarbon about 70 percent, PE about 40 percent of straight strength.
- Jun Keiryu Fluoro — Sunline — read 30 October 2026: "The specific gravity of water is 1.00 and that of fluorocarbon is 1.78"; nylon 1.14 and polyester 1.38 for comparison.
- Fishing line SEAGUAR — Kureha — read 30 October 2026: Seaguar is made and sold by Kureha's group company Kureha Gohsen; "High specific gravity provides quick sinking speed"; "Less elastic than nylon"; refractive index close to water's; no water absorption; Seaguar launched in 1971 as the first fluorocarbon (PVDF) fishing line.
- Understanding Fluorocarbon & FAQs — Seaguar — refractive indices (water 1.33, fluorocarbon 1.42, nylon 1.62); fluorocarbon stretches less than mono; faster sink; low water absorption; UV resistance; longer usable life; braid with a short fluoro leader.
- InvizX Fluorocarbon Mainline — Seaguar — product claim "significantly less visible underwater than monofilament and coated lines"; note it also claims "virtually no stretch," which conflicts with the FAQ.
- Why Fluorocarbon Isn't Invisible: The Optics Explained — Master Fishing Mag — refractive indices water 1.33, fluoro 1.42, mono 1.52; cylindrical-lens and polarization arguments.
- Best Fishing Line: Myths Busted — USAngler — refractive index range for nylon 1.53–1.62; competing stretch figures; claim that nylon is the most abrasion-resistant diameter for diameter, flagged as one test.
- Monofilament Stretch Explained — Master Fishing Mag — working stretch 2–9 percent mono, 1–4 percent fluoro, under 1 percent braid; 25–35 percent mono at break; no formal citations.
- Is Fluorocarbon Leader Really Tougher than Monofilament? — On The Water — bench abrasion test; matched-diameter samples broke at nearly equal pull counts; refractive index 1.4 vs 1.6 vs 1.33.
- Choose the Right Line for Your Fishing Needs — Berkley — comparison chart: sensitivity, visibility, buoyancy, memory, water absorption, knot ease; braid as UHMWPE; usual test ranges.
- Berkley Trilene XL Monofilament — Pure Fishing — mono sold 2–30 lb; wet-strength and knot-strength claims (no diameters published on page).
- 832 Advanced Superline — Sufix / Rapala — braid diameters by test (10 lb 0.008 in, 20 lb 0.009 in, 30 lb 0.011 in); 8 fibres, seven HMPE and one GORE Performance Fiber, sold on "Ultimate Abrasion Resistance" (re-read 30 October 2026; no float or stretch statement on the page).
- PowerPro — Shimano fish shop — Spectra fiber claims, low stretch, Enhanced Body Technology; test range 5–250 lb (no diameters published on page).
- Fishing Line Diameter Chart — Tackle Village — mono/fluoro/braid diameter chart attributed to Berkley Trilene, Berkley Vanish and Spiderwire Stealth; braid 35–45 percent thinner.
- Strongest Fishing Knots Connecting Braid to Leader — Sport Fishing — 15 lb braid broke at 34.4 lb and 50 lb braid at 62.8 lb on an Instron tester, supporting the point that braid ratings are conservative.
- Fluorocarbon Versus Braid: When To Use Each — Wired2Fish — braid floats and fluoro sinks; techniques for each; stretch helps treble hooks; fluoro tops out about 25 lb for bass.
- How to Choose Bass Fishing Line — Wired2Fish — line by technique table; mono floats, fluoro sinks; braid resists twist on spinning gear.
- Knots for Fluorocarbon Line — knots.fish — wet fluorocarbon knots before cinching; friction heat and memory as failure causes; Palomar as the standard terminal knot.
- Understanding Fly Line Tapers — Scientific Anglers — the fly line's weight is what is cast; AFFTA standard governs the first 30 feet.
- AFFTA Official Fly Line Specifications — Spinoza Rod Company — 5-weight target 140 grains, range 134–146, first 30 feet less level tip.
- Fishing and Boating Guide — Kentucky Department of Fish & Wildlife Resources — official regulations link.