BreathActive functional lining for moisture wicking and dry feet Rubber outsole for Durability. Slip, oil and abrasion resistentance. Heat resistent to 572 °F id Cell elements in the forefoot and heel made of soft EVA to absorb shock and impact. Removable EVERCUSHIONRELIEF Footbed for support cushion and all day comfort. Polyeurethane Insole. Color: gray