The O’Neill Psycho Tech 4/3+ Chest Zip Wetsuit combines gooey stretch and fiery warmth to create a suit that will keep you warm and in the lineup for hours. Constructed with TB4 neoprene with the enhancement of graphene, the Psycho Tech is now stronger and warmer than ever. The Psycho Tech 4/3+ utilizes O’Neill’s F.U.ZE entry to allow for easy entry and maximum seal. The Psycho Tech is held together with stitchless exterior fluid seam weld technology and reinforced with Interior Recycled TBX Tape. With a mix of high-performance features and a toasty warm liner, the Psycho Tech 4/3+ Chest Zip Wetsuit will keep you in the water longer.