O'Neill Men's Psycho 1 Zen Zip FSW 3/2mm Wetsuit - MT ULTRA MINIMAL SEAM DESIGN: Insane flexibility, fit and warmth using a unique design which utilizes l SINGLE FLUID SEAM WELD: Keeps water from entering at all seams and critical points PATENTED Z.E.N ZIP ENTRY (WITH DRAIN HOLE): Featuring a pullover internal neck seal that blocks out TECHNOBUTTER NEOPRENE: The most advanced super stretch neoprene available on the market. 20% lighter Krypto knee pads