This is the Tilos 2.5mm Sport Skin SupraTex Sole Kids Beach Socks Features: Top quality material and construction for durability Neoprene sole with lycra and adjustable cuff Protects feet from hot sand, mud, blisters and sunburn Super lightweight, weighs less than 1 lbs (.45kg) Improves performance for beach volleyball, sand sports, snorkeling Available in sizes 5-13 in mens and 6-14 in womens Perfect for poolside or at the sandy beach The Tilos Sport Skin Sock is a high quality sock made to protect your feet from the hot sand. The 2.5mm SupraTex sole provides superior insulation from the heat of the sand. The lycra top is breathable and provides UV protection. Reinforced toe and heel patches provide extra durability in areas that wear out quickly.