Maximum Ventilation!AirMesh panels for maximum ventilation and medium density Precision Tube Technology for balanced performance.Fit: This shoe fits true to size. Width is contoured and glove like. Very secure feeling in the heel and midfoot. Low and supportive fit through the vamp region.Features:- AirMesh panels for maximum ventilation- Medium density Precision Tubes for balanced performance- Anti-bacterial molded EVA/PU socklinerAll M Series models include:- Dual Density EVA midsole for optimum cushioning and support- TPU shank for torsional stability- Breathable, synthetic uppers for instant comfort- Dri-Lex lining wicks moisture away from feet- AirMesh tongue increases airflow to keep feet cool- Skeletal TPU stabilizer on upper for lateral stability- Durable Goodyear Max outsole with 6-month wear guarantee