Propet hikers with Vibram Arctic Grip AT are ready to hit the trail with the perfect fit. Waterproof bootie construction inside a suede Nubuck and mesh upper with padded collar and tongue and abrasion resistant rubber toe cap. Age - Adult Care Instruction - Spot Clean Insole Description - OrthoLite(R) X40(TM) sets the industry standard for high rebound performance with an elasticity rating over 40% Insole Material - Open Cell Outsole Description - EVA midsole with toe guard plus Vibram(R) Arctic Grip(R) three season traction outsole with Wet-Ice Technology Outsole Material - Rubber Product Closures - Lace Size Description - M = Medium (D) 3E = X-wide (3E) 5E = XX-wide (5E) Size Fit Information - True to Size Waterproof - Waterproof Heel Height - 2 Use - Hiking Technologies Medicare Approved:These styles have been approved for reimbursement under the Medicare Therapeutic Shoes for Persons with Diabetes Benefit (also known as the Therapeutic Shoe Bill). Removable Footbed:These styles feature footbeds that can be removed to accommodate custom orthotics. Waterproof:Feet will stay warm and dry with these styles that have been specially designed to keep water out with our Sealtex(R) bootie or laminate construction. OrthoLite(R):OrthoLite(R) insoles are made of open cell, lightweight foams that create a cooler, drier shoe interior without adding unwanted bulk or weight. It's comfort from the inside out.