Mystic MSTC 3mm Cold Hood in Black I 2021 The new Mystic MSTC 3mm Cold Hood has been designed using quality neoprene that is light, comfy and durable. Ideal for all your water sporting activities where the water is chillier and you need something extra to keep you toasty. The mesh neoprene is 3mm in thickness to ensure the heat from your head is nicely insulated with GBS (Glue Blind stitching) to ensure less water entry when in the water. The inner polar lining will help to keep you warm for hours, no need to get out the water to warm up - the new Mystic Hood will do it for you.