The Zone 3 Unisex Neoprene Heat-Tech Warmth Socks is a warm protective swim sock great for swimming and open water sports. Heat-Tech is an insulation technology which uses a titanium layer that helps to reflect your body heat back to help keep you warmer for longer. The close fit material prevents water ingress and allows you to have freedom of movement, warmth and protection whilst remaining comfortable. 3D-Grip gives you superior grip even when wet, making it the perfect accessory for water sports and activities. Warm Protective Swim Sock Heat-Tech insulation layer Close fit for protection and warmth 3D palm for superior grip on wet surfaces