The Aftersail Boot from Sperry features a Waterproof Construction Keeping Feet Dry in Wet Conditions. Waterproof Suede and Water Resistant Nylon Provide Durable and Lasting Wear. Removable Full Length Footbed Featuring Memory Foam Conforms to Foot for All-Day Comfort. Cushioned Micro-Fleece Lining for Added Comfort Luxury and Weather Protection. Non-Marking Rubber Outsole with Wave-Siping for Ultimate Wet Dry Traction.