C Skins Legend 4mm GBS Sock The C Skins Legend 4mm GBS Sock is a multi-sport sock which can be used in a variety of water sports! The sock is ideal for bodyboarding fish and can be used while swimming and surfing. The reinforced Kevlar sole increases durability and the Glued and Blindstitched Seams add to the water proofing and help keep the heat in. This sock is perfect for any water sport enthusiast. Features Glued and Blindstitched Seams 4mm Free Flex neoprene Reinforced kevlar sole Thermotech Polypro lining