I tested the new material, TPU Aero! It exceeded my expectations. It has excellent support and elasticity, a softer texture than foam, and weighs less. It is merely 50–80g heavier than hand-carved foam. The only drawback is its high material price.
I forgot to mention its biggest advantage: it bonds extremely well with hot glue. This solves the common issue that regular TPU cannot be glued effectively.😋