SUNLU TPU 3D Printer Filament 1.75mm, High Speed 95A, 1KG Flexible, Grey Review (2026)

Who should buy this filament

This spool suits makers who already print functional flexible parts, such as phone cases, cable protectors, furniture feet or gaskets, and who want a neutral grey that blends into hardware rather than standing out. The high speed formulation is aimed at owners of newer, faster printers with direct drive extruders, since TPU generally needs a short filament path and firm grip to print reliably, and the high speed blend is designed to keep up with printers running quicker than the 40 to 60mm/s that older TPU recipes were limited to. Beginners attempting their first flexible print should still expect a learning curve around retraction and speed tuning, since TPU behaves very differently from rigid filaments like PLA regardless of the brand.

Material specs in plain English

This is a 95A shore hardness TPU, which sits on the firmer end of the flexible filament range, meaning it holds its shape better than very soft 85A or 90A TPUs while still bending and compressing under load. SUNLU lists a 1.75mm diameter with plus or minus 0.03mm accuracy and roughly 330 meters of filament per 1kg spool, packaged in a vacuum sealed bag to limit moisture pickup before first use. The recommended print settings are a 210 to 230C nozzle and 50 to 60C bed, with speeds around 80 to 120mm/s on printers that can handle the faster formulation; owners on older Bowden setups will usually need to print well below that range regardless of what the spool suggests.

Living with TPU day to day

TPU filament absorbs atmospheric moisture readily, and wet TPU tends to bubble, hiss and print rough textured surfaces instead of clean layers, so storing the spool in a dry box or airtight container with desiccant between sessions is worth the extra step. Because TPU flexes rather than pushing rigidly through the extruder, retraction settings usually need to be reduced compared to PLA, and travel speed slowed down, otherwise stringing and oozing between parts becomes common. Direct drive extruders generally handle TPU far more predictably than Bowden setups, since the shorter path gives the material less room to buckle inside the tube before reaching the hot end.

Trade-offs versus other TPU spools

Compared with SUNLU's own black 95A high speed TPU, which carries a slightly higher score in independent testing roundups, the grey color reviewed here is functionally the same formulation, so the choice mostly comes down to which color fits the intended part. Against OVERTURE's high speed 95A TPU, another commonly recommended option at the same hardness, SUNLU's spool is priced and sized similarly for a 1kg roll, with both brands marketed as engineered to run faster than generic TPU. Buyers wanting a firmer, more dimensionally stable flexible filament for structural parts might instead look at Polymaker's TPU95 line, which is UV resistant and sold in a smaller 0.75kg spool aimed at more demanding applications.

Verdict and who should pick something else

For anyone printing grey flexible parts on a printer already set up for TPU, this spool is a straightforward, reasonably priced choice that should perform close to SUNLU's better rated black version once dialed in. Printers without a direct drive extruder, or owners hoping to print TPU with zero tuning effort, are likely to be frustrated regardless of brand, since flexible filament always demands slower speeds and reduced retraction compared with PLA or PETG. Anyone needing a softer, more rubbery feel should look at a lower shore hardness like 85A, since 95A prints firmer than many people expect from the word flexible.

Frequently asked questions