This is the Aqua Lung Men&';s 5mm Aquaflex Wetsuit Scuba Diving Wetsuit Features: 4-way stretch neoprene (petroleum free) for a maximum range of motion Canadian cuff Semi dry zipper system Powertex knee protection The name AquaFlex has become synonymous the world over for stretch, comfort, and warmth. This line of wetsuits represents the best value and quality on the market today. All AquaFlex suits are made of four-way stretch neoprene, canadian seals to limit water entry and provide extra warmth.