Speedo Men's Men's Hydro Trainer All Purpose Water Shoe 100% Synthetic and mesh Synthetic sole Provides wet/dry versatility for water-intensive activities Speedo exclusive HydroTread multidirection and non-marking outsole for water dispersion and maximum traction with quick-adjust bungee for optimal fit Trademarked 360 Degree Ventilation for maximum breathability with removable perforated insole Exclusive Speedo Foam Dual Density provides shock absorption and long lasting comfort