- Upper: Race-Lock lace system with both speed lace and standard lace for custom fit options for both racing and training. Molded 3D heel counter with integrated heel pull tab for fast transitions and great heel support. Barefit lining combined with our internal structure to give the best internal feel and close to the foot fit. Breathable mesh upper for optimal cooling.
- Midsole/Outsole: Unique dual density Z-Bound‰ã¢ and ZVA placed in a Heel to Toe configuration with great rebound for mid-foot strike and added cushioning when heel striking. Constant ground contact provides mid-foot support with a Medial Post for guidance. Carbon Rubber tread gives the outsole lightweight, durable traction.