Responsive, supportive and flexible, these men's running shoes charge every step with endless energy. The shoes have a full-length boost midsole that works with the STRETCHWEB outsole to harness and release energy with every step so you can run further with less fatigue. TORSION SYSTEM in the midfoot pairs with the sock-like fit of the adidas Primeknit upper to support your foot's natural flex from heel to toe. With a Continental Rubber outsole that provides traction in all conditions.