Slim Tech 3 4 Length Insoles Clearance Water resistant nylon upper The soft exchangeable footbed Water resistant nylon upper low bulk insulation for warmth and comfort• SOLARCORE® Aerogel insole provides underfoot superior warmth while being extremely flexible and ultra thin• 100% recycled mesh footbed cover• Cleansport NXT™ treated for natural odor control• 5% recycled PU removable footbed• Merrell Air Cushion in the heel absorbs shock and adds stability• Molded nylon arch shank• Super Rebound Compound midsole provides durable shock absorption to help reduce torque and allow for a smooth transition into the midfoot• Vibram® Arctic Grip™ All Terrain outsole designed to effectively extend the winter traction season flat heel cradle adding stability and motion control to limit excess stress on feet The 3 4 length with tapered edge leaves extra room at the toes while the non slip pad at the heel helps hold the orthotic in place