Quick Definition: A TPU post is a thermoplastic polyurethane wedge set into the inner midsole to stabilize heavy overpronation.
Engineered Stability
Unlike soft foam, thermoplastic polyurethane (TPU) is a rigid, resilient polymer. Inserting a TPU post under the arch stops inward rotational collapse instantly.
Key Benefits
- Targeted arch support that will not break down or compress over time.
- Maintains shoe alignment under heavy runner impacts.
Top Recommended Shoes
- Mizuno Wave Inspire 19 – Uses an anatomical TPU wave plate post for dynamic support.
Frequently Asked Questions
Is a TPU post uncomfortable for high arches?
It can feel hard under neutral or high arches; TPU posts are designed specifically for flexible flat or overpronating feet.