Spun from quick-drying, odor resistant hydrophobic yarns, these are the ultimate tools for hardworking feet exploring cool summer flows or salt flats. Right Angle arch support enhances ride across variable underwater terrain, while bolstered cushioning and an anti-abrasion build pampers feet. Mid-calf height. 75% polypropylene/20% nylon/3% polyester/2% LYCRA. SIZES: Medium(8-10), Large (10-12), X-Large(12+).