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
SThermoplastic Polyurethane
Excellent layer adhesion; extremely impact resistant; highly durable
Soft TPU
CLow durometer TPU (~80A)
Very flexible
Detailed Comparison
Property
TPU
Soft TPU
Tier Rating
Tier S
Tier C
Family
Flexible
Flexible
Nozzle Temp
200-240°C
200-220°C
Bed Temp
30-60°C
30-50°C
Enclosure
not needed
not needed
Cooling
Moderate cooling
Low cooling
Moisture Sensitivity
high
high
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)
Frequently Asked Questions
Is TPU or Soft TPU better for 3D printing?
TPU is generally rated higher (Tier S) compared to Soft TPU (Tier C). However, the best choice depends on your specific needs: TPU is best for Excellent layer adhesion; extremely impact resistant; highly durable, while Soft TPU is best for Very flexible.
What are the temperature differences between TPU and Soft TPU?
TPU prints at 200-240°C nozzle / 30-60°C bed. Soft TPU prints at 200-220°C nozzle / 30-50°C bed.
Do TPU and Soft TPU need an enclosure?
TPU: not needed. Soft TPU: not needed.
Which is more beginner-friendly: TPU or Soft TPU?
Both TPU and Soft TPU are beginner-friendly options.