Surge is one of the industry's few athletic shoes with added depth and double added depth in one shoe. A built-in heel cushion pad and rocker bottom with wide shank add to the shoe's overall comfort and performance. Plus Fitting System - Two Removable Footbeds for Added and Double Depth Drilex Lining with AEGIS Microbe Shield for Odor and Stain Control Tri-Support Insole Built-In Heel Cushion Pad Rocker Bottom and Wide Shank Durable Rubber Outsole and EVA Midsole Tempered Steel Shank Extended Medial Heel Stabilizer Full, Rounded Toe Soft, Foam-padded Tongue and Collar Accommodates Prescribed Orthotics SKU: 40760-43