Sperry Top-Sider Men's Voyager Boating Shoe 100%Synthetic Imported Synthetic sole Featuring Sperry WaterBlock a breathable waterproof membrane that keeps feet dry and comfortable Adjustable bungee allows for secure wear and easy on and off ASV Technology in the heel absorbs vibration and reduces shock up to 30% Removable full-length compression molded EVA footbed maximizes comfort Adaptive Wave-Siping disperses water underfoot to reduce slippage