Polymaker PolyFlex TPU90 1.75mm Clear 0.75kg - Flexible TPU Filament

In this review of the PolyFlex TPU90 1.75mm clear filament, the bottom line is simple: this is a reliable flexible TPU for makers who need a balance of print speed, toughness, and outdoor resistance. The reviewer found it especially useful for wearable prototypes, gaskets, and flexible parts because it prints without special hardware and offers consistent layer adhesion when settings are tuned properly. For anyone wanting a soft but durable filament that is UV resistant and well packaged to avoid moisture, PolyFlex TPU90 is worth testing.

Key Features

• Shore 90A Flexibility: Provides a rubbery, durable feel that keeps parts flexible while retaining shape memory for repeated use.
• Easy to Print: Designed to run on most desktop FDM/FFF printers with nozzle temps around 210 C to 230 C and a sensible printing speed range.
• UV Resistant: Suitable for outdoor applications where exposure to sunlight could otherwise degrade TPU properties.
• Tangle and Moisture-Free Packaging: Dried, vacuum-sealed spool with a desiccant and a resealable bag reduces filament moisture and tangles on storage.
• Strong Layer Adhesion: The filament yields consistent, bubble-free and warp-free layers when correct print settings are used.
• Wide Application Range: Works for gaskets, shoe parts, phone cases, keyrings and small mechanical components where flexibility and durability matter.

Who It's For

This filament is aimed at hobbyists, prototypers and small-scale manufacturers who need a mid-hardness TPU that balances flexibility with toughness. It is especially useful for wearable items, seals, and bike or drone components where impact resistance and some stretch are required.

Those who should look elsewhere include people requiring ultra-soft elastomers below shore 90A or specialist materials that need higher chemical resistance or industrial-grade certifications; also users who cannot tune print settings or accept slower flow rates for flexible filaments may prefer a different material.

Pros & Cons

Pros

• Good combination of flexibility and toughness suitable for functional parts and wearables.
• UV resistance makes it a practical choice for outdoor applications and exposed parts.
• Careful winding, drying and vacuum packaging helps reduce tangles and moisture-related print failures.
• Compatible with most desktop FDM/FFF printers without hardware changes.

Cons

• Some users report mixed results with self-adhesion and perceived stiffness, so fine tuning retraction and temperature may be required.
• Printing flexible filaments still demands slower speeds and attention to feed path to avoid jams compared with rigid filaments.

Specifications

Brand	POLYMAKER
Material	Thermoplastic polyurethane (TPU)
Diameter	1.75mm
Weight	0.75kg
Shore Hardness	90A
Printing Temperature	210 C - 230 C
Recommended Bed Temp	25 C - 60 C

Our Verdict

PolyFlex TPU90 is a reliable, well-packaged flexible filament that delivers strong layer adhesion and UV resistance, making it a solid choice for hobbyists and small producers building wearables, gaskets, or exposed parts. It represents good value for users willing to tune print settings to get the best balance of flexibility and durability.

Frequently Asked Questions

Will this filament work on a standard desktop FDM printer?
Yes. PolyFlex TPU90 is formulated to run on nearly all desktop FDM/FFF printers without hardware modifications, though a calm filament path and reduced print speed help.

How should I store the spool to avoid moisture?
The spool arrives vacuum-sealed with a desiccant; keep it in the resealable bag with the desiccant when not in use to maintain dryness.

What temperature and speed settings are recommended?
Use a nozzle temperature between 210 C and 230 C, bed temperature 25 C to 60 C, and printing speeds in the 30mm/s to 60mm/s range with the fan on for best results.