Plus Fitting System - Two Removable Footbeds for Added and Double Depth; Removable, Polyurethane, Drilex Lined Footbed; Breathable Mesh and Soft Fabric Lining; Durable Rubber Outsole and EVA Midsole; Dual Shank System - Wide, Synthetic Fiber and External TPU; Firm Heel Counter; Rocker Bottom; Soft, Foam-Padded Tongue and Collar; Accommodates Prescribed Orthotics