Keep your feet extra warm while swimming in the cold season with the Zone3 Neoprene Heat Tech Swim Socks 3.5mm.    Key Features: High stretch 3.5mm thick neoprene with titanium lining. Liquid seal finish and Smoothskin closure system. Increased length with Velcro closure. 3D sole pattern grip. Double blind stitched, glue bonded seams. Part of a neoprene accessory range designed for year round training. Key Benefits: Some of the warmest and most water tights socks on the market. Warm, dry and secure design. The ability to tuck into wetsuit. Increased grip and protection when walking to and from the water.