Propet trail running is here featuring our lightweight knit upper and the Vibram Arctic Grip AT outsole. Take to the trails in this precision knit and leather upper with padded collar and tongue. Pull on tabs at heel and tongue 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% Outsole Description - EVA midsole with toe guard plus Vibram(R) Arctic Grip(R) three season traction outsole with Wet-Ice Technology Product Closures - Lace Size Description - M = Medium (B) Size Fit Information - True to Size Waterproof - Water Resistant Upper Feature - Scotchgard(TM) Technologies Double Insoles:With the Propet EV (extra volume) insole system, customized fit and comfort is easy. Remove the bottom insole to provide a little extra volume or remove both to accommodate custom orthotics. Scotchgard:Shoes featuring Scotchgard's protective treatment means these styles are water repellent and resist stains. 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. Medicare Pending:These styles are pending A5500 Medicare approval.