Heat Tech 2016 Zone3 Neoprene Gloves Increased Glove Length: Gives the option to tuck into wetsuit Velcro Fastener: Helps to reduce water ingress and keeps sock in position. Insulated Neoprene: With titanium lining to help keep feet warm. ater Block: An innovative Smoothskin closure system External Seams with Liquid Seal Finish: Watertight, comfortable and durable 3D Palm Pattern Grip: Provides protection and grip when walking to the water.