Reebok Women's Crossfit Nano 5.0 Training Shoe 100% Synthetic/Textile Synthetic sole Extremely durable Kevlar material is infused on the entire upper, specifically where you need it for the ultimate support and protection All new re-engineered shape, fits your foot even better than before with a more precise anatomical design includin a newly developed contoured heel counter New NanoShell midsole is a hard Thermoplastic polyurethane shell that supports the foot during medial and lateral movements as well as heavy lifts while still providing a soft contact for the foot