Typhoon Storm 5/4/3mm Back Zip Wetsuit - Men'sTyphoon Storm 5 4 3mm Back Zip Wetsuit Men's The Storm 5. 4mm wetsuit is built to keep you warm, comfortable and moving freely when the conditions turn chilly. Constructed with 5 4 3mm neoprene, it delivers reliable insulation where you need it most. Thicker panels across the chest and back help retain body heat, while slightly thinner sections in the arms and legs maintain flexibility for paddling, swimming and general watersports. Stretch panels