Nylon is the filament to reach for when a part has to survive real mechanical stress rather than just look good — gears, hinges, snap-fit brackets, tool handles, anything that flexes, wears, or takes a repeated load. It’s tougher and more abrasion-resistant than PETG, and its low friction coefficient makes it the only common desktop filament that’s genuinely good for parts that slide or rotate against each other. The trade-off is moisture: nylon is the most hygroscopic material most makers will ever print, and skipping the drying step is the single most common reason people write it off. This guide ranks the nylon spools worth buying in 2026, from budget unfilled rolls to fiber-reinforced grades.
Nylon by the numbers
- >10% — the amount of its own weight in water nylon filament can absorb in under 24 hours once a spool is opened, per MatterHackers’ nylon printing guide — the reason drying isn’t optional the way it sometimes is with PLA.
- 240-260 °C — the typical unfilled-nylon nozzle range, with a 70-90 °C bed, per MatterHackers; most people start at 250 °C and adjust in 5 °C steps until stringing and layer adhesion clean up.
- 70-80 °C for 4-6 hours — the standard drying window for a nylon spool, extending to 8-12 hours for filament that’s been open and exposed to humid air, per Sunlu and PrintDry dryer guidance.
- 209 °C — the heat-deflection temperature SUNLU lists for its PA6-CF carbon-fiber blend, well above what unfilled PLA or PETG parts can hold under load without softening.
Best nylon filament at a glance
| Filament | Best for | Reinforcement | Nozzle temp | Price /kg | Rating |
|---|---|---|---|---|---|
| eSUN ePA | Best overall | Unfilled | 240-260 °C | ~$39.99 | ★★★★★ |
| Overture Nylon | Best budget | Unfilled | 240-260 °C | ~$32-34 | ★★★★☆ |
| SUNLU PA6-CF | Best carbon-fiber reinforced | 20% CF | 260-280 °C | ~$44.99 | ★★★★½ |
| Polymaker PA6-GF | Best glass-fiber / warp-free | Glass fiber | 250-270 °C | ~$32.50 (2kg spool) | ★★★★★ |
| Bambu Lab PAHT-CF | Best for Bambu ecosystem | Carbon fiber | 280-300 °C | ~$65-80 | ★★★★☆ |
Nozzle temperatures are manufacturer starting points — tune for your printer and hotend. Prices fluctuate; check current Amazon pricing via the links below.
1. eSUN ePA — Best Overall
eSUN ePA
- Well-documented, natural-color unfilled nylon that prints predictably once fully dried.
- High inter-layer adhesion and low friction coefficient — genuinely useful for gears and hinges.
- No fiber reinforcement to wear down a brass nozzle, unlike the CF/GF grades below.
- Same drying discipline as every unfilled nylon — skip it and prints pop and bubble.
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eSUN’s ePA is the spool we hand to anyone printing their first nylon part. It’s unfilled, so a standard brass nozzle handles it fine, and the moisture behavior and print settings are well-documented across enough builds that dialing it in doesn’t take much guesswork. It costs a few dollars more per kilo than Overture below, but the consistency is worth it for a first functional part you actually plan to use.
2. Overture Nylon — Best Budget
Overture Nylon
- One of the cheapest credible unfilled nylon spools, at roughly $33/kg vs $40+ for eSUN.
- ±0.02-0.03 mm diameter tolerance, tight enough for consistent extrusion.
- Widely stocked, so it's usually easy to find in stock when other nylon spools sell out.
- Less published long-term consistency data than eSUN; fine for functional parts, not aerospace tolerances.
If you’re printing nylon parts by the batch rather than one at a time — jigs for a workshop, replacement gears for multiple machines — Overture keeps the per-part material cost down without the tolerance being a gamble. It’s the pick for testing whether nylon solves a specific wear problem before committing to a pricier spool.
3. SUNLU PA6-CF — Best Carbon-Fiber Reinforced
SUNLU PA6-CF
- 20% carbon fiber by weight adds real stiffness over unfilled nylon for load-bearing parts.
- Heat-resistant to 209 °C per SUNLU's spec sheet, well above unfilled PLA or PETG parts.
- Requires a hardened-steel or ruby nozzle — carbon fiber chews through brass fast.
- Matte, less glossy finish than unfilled nylon; the trade-off for the stiffness gain.
When a part has to hold a load rather than just fit together — a bracket, a jig, a housing under stress — SUNLU’s PA6-CF gets you dimensional stiffness plain nylon can’t match. Make sure your printer has a hardened hotend before loading it; carbon fiber is abrasive enough to wear through a stock brass nozzle within a few hundred grams.
4. Polymaker PA6-GF — Best Glass-Fiber / Warp-Free
Polymaker PA6-GF
- Glass-fiber reinforcement engineered specifically to reduce warping versus standard nylon.
- Ships in a 2kg spool, which works out cheaper per kilo than most 1kg reinforced spools.
- Stiffer and more dimensionally stable than unfilled nylon, without carbon fiber's nozzle wear.
- Still needs a wear-resistant nozzle over time — glass fiber is gentler than CF but not nothing.
Polymaker built PA6-GF specifically to fight nylon’s biggest print-quality problem: warping and shrinkage on larger parts. The glass fiber adds stiffness without carbon fiber’s nozzle-eating abrasion, and the larger 2kg spool actually undercuts SUNLU’s PA6-CF on price per kilogram — a rare case where the “better behaved” option is also the cheaper one.
5. Bambu Lab PAHT-CF — Best for Bambu Ecosystem
Bambu Lab PAHT-CF
- High-temperature nylon-CF blend tuned and profiled specifically for Bambu Lab printers.
- Needs a hardened, high-temp-capable hotend — the X1C, X2D, and P1/P2-series with an all-metal upgrade qualify.
- Highest price per kilogram in this guide, reflecting the high-temp PAHT base resin.
- Best reserved for parts that genuinely need both fiber-reinforced stiffness and higher heat resistance than PA6-CF offers.
If you’re running a Bambu Lab X2D or X1-Carbon-class machine with a hardened, high-temp hotend already installed, PAHT-CF is the spool tuned to use that capability instead of leaving it on the table. It costs noticeably more per kilo than PA6-CF, so it’s worth reaching for on parts that actually need the extra heat resistance rather than as a default nylon pick.
How to choose nylon filament
- Drying first: Nylon prints only as well as it’s dried. Budget for a filament dryer rated to hold 70-80 °C, not just a dry box for storage.
- Unfilled vs reinforced: Unfilled nylon (eSUN, Overture) is cheaper and easier on a stock brass nozzle. Carbon- or glass-fiber grades add stiffness but need a hardened or ruby nozzle to avoid rapid wear.
- Nylon vs PETG-CF: Nylon’s low friction coefficient makes it the better choice for parts that slide or rotate — gears, bushings, hinges. PETG-CF is far less hygroscopic and easier to live with day to day if a part just needs stiffness, not wear resistance.
- Enclosure helps: Nylon shrinks as it cools, same failure mode as ABS/ASA. A printer enclosure or enclosed printer makes larger nylon parts print reliably instead of occasionally.
- Keep it sealed: Reseal spools with desiccant between prints — nylon can absorb enough humidity to ruin a print within hours of being left out.
Related guides
- Best 3D printer filament of 2026 — our full guide across PLA, PETG, ABS, ASA, and TPU.
- Best filament dryers of 2026 — dryers rated to hold the 70-80 °C nylon needs.
- Best 3D printers for prototyping — machines built for carbon- and glass-fiber-reinforced filament.
- Best 3D printer hotend of 2026 — hardened and all-metal hotends for fiber-reinforced nylon.
- Best 3D printer enclosures of 2026 — control warping on larger nylon parts.
- Best carbon fiber 3D printers of 2026 — machines purpose-built for CF-reinforced filament.
- Best 3D printers of 2026 — our head-to-head pillar ranking for every budget.