The Psycho One minimal seam madness is the ultimate high-performance coldwater wetsuit. Built with TechnoButter 2, and available in both F.U.Z.E. and Z.E.N. Zip Closures. The F.U.Z.E. (Front Upper Zip Entry) Closure System keeps you dry without restricting flexibility. The 360° Inner Barrier prevents flushing in all directions. Water entering the suit stays shielded from the body. The Cinch Cord tightens to keep water out. Now available in Youth sizes. Available in 3/2mm and 4/3mm models. O'Neill Psycho One Wetsuit 2017