Plus Fitting System? - Two Removable Footbeds for Added abd Double Depth. Removable ULTRON? Footbed with Heel Cushion and Maximum Arch Build-Up. Flared, Lightweight Rubber Outsole with EVA Wedge Midsole. Extended Medial Heel Stabilizer. Drilex? Lining. Built-in, Wide, Synthetic Fiber Shank.