Plus Fitting System - Two Removable Footbeds for Added and Double Depth Removable, Moldable, Dual-density insert with Drilex Topcover for Moisture Control - Allows You to Replace With Custom Orthotic Inserts Ultra lightweight and Dual-density Polyurethane Slip-Resistant Outsole and Extended Medial Heel Stabilizer for All Day Balance and Comfort Stretch Fabric Lining & Soft, Foam-Padded Collar Keep Your Feet Comfortable and Protected from Abrasions and Discomfort Ideal for a Diabetic Foot - Removable Insoles Accommodate Custom Orthotics