It is easy to be motivated and active with the amazing comfort features of the 608v4 sneakers. Suede upper. 10 mm drop: due to variances created during the development and manufacturing processes, all references to 10 mm drop are approximate. Dual-density collar uses both a softer density foam against the foot for cushioning and a firmer density foam for support. EVA foam footbed for cushioning. ABZORB cushioning foam on the lasting board and in the heel. IMEVA (injection-molded EVA foam) midsole for firm, yet flexible cushioning. Internal shank. MedicareHCPCS code = A5500; may be eligible for Medicare reimbursement. Mark-free rubber outsole.