eS - Cramer (Black/White/Red) - Men's: Soft action leather/suede upper with perforations. Perforated tongue for breathability. Nylon hidden lace loops for protection. System Flo2(tm) high air flow breathable tongue. Elastic tongue centering straps. STI Foam(tm) Level 2 footbed cushioning system with integrated heel counter for stability. Full-length polyurethane midsole. System 02(tm) heel cushioning system. 400 NBS stitched gum rubber outsole. Zig-zag tread pattern in key areas. Outsole flex grooves for increased grip.