The Psycho One series is O'Neill's entry into high-end wetsuits, offering some of the stretchiest materials and a lot of thought in stitching and fit, at an affordable price. F.U.Z.E. The closure and TechnoButter make putting on super easy and the latter makes the neoprene super light to use and doesn't restrict movement whether you're windsurfing, kiteboarding or kiteboarding!