Waterproof 2/5mm Men's Hooded Vest2 5mm U1 Men's Hooded Vest Waterproof coupled an anatomically sculpted 2mm undervest to our trend setting next generation H1 Hood 3 5mm with H. A. V. S technology. Fits all suits without a fixed hood. Features: 100% microcell CR neoprene More expensive but in fact the only neoprene that really works for diving. Excellent durability and insulation far better than other Neoprene qualities, like SBR, SCR etc. Anatomical sculpting. Bonded high quality