IST 4mm Super Stretch Diving Freediving Neoprene High-Cut Socks 4mm high-grade neoprene high-cut socks with super-stretch material for more comfort and easier donning and doffing. Double glued and blind stitched construction Rotex Fabric provides protection on toes area and durable traction sole. Best for using full-foot fins and great in cooler water temperature. Perfect for Free Diving Scuba Diving Spear Fishing