Speedo's exclusive Surf Knit technology is designed with a lightweight breathable upper to offer 360° ventilation and maximum comfort. With a hydrophobic insole, Surf Knit is built to absorb nearly 50% less water and dry faster. The S-TRAC outsole streams water away from the shoe for serious traction on wet surfaces. Surf Knit is designed to perform seamlessly on both dry-land and water workouts. Optimal water management and dispersion allows you to maximize your experience. S-TRAC rubber outsoles offer water management and dispersion characteristics providing maximum traction. S-TRAC technology streamlines water away from the outsole and enhances direct surface contact to improve traction and slip resistance. Speedo Surf Knit technology is engineered to offer the ultimate support, breathability and comfort where you need it most. Hydrophobic material offers superior drainage and quick drying properties. Shoes are available in multiple sizes and colors.