Bi-Fit Dual density insole board made from 100% recycled polyethylene/polyurethane, provides support and stability underfoot. Poli-Cork footbeds are made with 70% recycled foam with active carbon and cork bits help combat odor and naturally move moisture. Capilene linings made from recycled material wick away moisture keeping feet cool and comfortable; quick drying. Has a medium width, full toe box and medium arch/instep.