Avia Men's Avi-Chase A5034M, 90% Synthetic/10% Leather Upper Imported Rubber sole Cantilever Sole - CANTILEVER centers the heel over a concave sole. The concave sole acts like a trampoline to soften impact, stabilize the heel and provide increased energy return. Breathable Mesh Upper - Designed with synthetic overlays to offer an all-round breathable and supportive fit for the whole foot. Padded Collar - Offers greater comfort around the ankle. Carbon Rubber Outsole - Placed in high-wear areas for last lasting durability and abrasion resistance. Molded Foam Insole - Offers greater underfoot cushioning for excellent step-in comfort.