Avia - A2020M (White/Submarine) - Men's: Designed to provide all day comfort and support!; Cantilever System technology which 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. Leather and mesh upper for excellent durability. Removable molded EVA sockliner. Compression molded EVA midsole. Two piece rubber outsole with exposed EVA.