TPU vs Soft TPU
Compare TPU and Soft TPU filaments side-by-side so you can pick the right one for your 3D printing project.
TPU vs Soft TPU: TPU is known for excellent layer adhesion, while Soft TPU is known for very flexible. Both have no enclosure requirements; TPU prints at higher nozzle temperatures (200-240°C vs 200-220°C). Choose TPU for excellent layer adhesion, or Soft TPU for very flexible.
Key differences at a glance
TPU
SThermoplastic Polyurethane
Excellent layer adhesion; extremely impact resistant; highly durable
Soft TPU
CLow durometer TPU (~80A)
Very flexible
Detailed Comparison
Green marks the generally easier or more forgiving option in that row, based on tier, enclosure needs, and moisture sensitivity. It is not always the better choice for a specific job, so weigh it against what your project actually needs.
Strengths Comparison
TPU Strengths
- Excellent layer adhesion; extremely impact resistant; highly durable
- Great for combat robots, tactical/rough-use parts
- Rubber-like parts (gaskets, grips, bumpers, wheels)
Soft TPU Strengths
- Very flexible
Considerations
TPU Caveats
- Slow printing; retraction can cause jams (especially in Bowden setups)
- Stringing is common
- Very moisture sensitive; wet TPU prints poorly
Soft TPU Caveats
- Can tangle around drive gear
- Uncomfortable for wearables (doesn't breathe; gets sweaty)