This is the ScubaPro Go Sock 3mm Thin Sole Scuba Diving Boot BootiesFeatures: Thin sole provides some cushion and stability. Low-cut upper enhances comfort and makes for easy donning and doffing. Available in eight sizes, from XS to 3XL. Designed to be worn with GO travel fins, the new 3mm GO sock offers versatile foot protection. It is also ideal for wearing on tropical beaches and in training pools. "