Flexible
Flexible materials are wear and abrasion resistant and have exceptional inter-layer adhesion. Common applications include grips, anti-slip parts, vibration dampening, wheels, and much more. Flexible filaments are rated on the Shore A-type Hardness scale; the higher the rating, the stiffer the filament.
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Flexible and Breathable Insole by Thingiverse user Gyrobot | Flexfill 98A Vertigo Grey