The Psycho range of wetsuits has something to offer everyone in terms of performance, warmth and durability. Psycho wetsuits start with the Psycho 1 which uses the zen zip closure system which means the entire suit is constructed and the zip is added to the back meaning you get one of the most comfortable and water secure zip systems. Pyscho 1 is all about getting the most flexible fit which is why there are few panels on the suit. It also uses the very best neoprenes such as the Technobutter 2 which is the lightest and has the least water retention of any neoprene. The Psycho 3 has been O'Neill's flagship wetsuit for many years and is a completely stitch free construction meaning water has less points that it can enter the suit. You stay warm for longer and with the addition of the very high grade flexible neoprene you also stay warmer for longer.