O’Neill’s PsychoTech wetsuit is easily the most feature filled wetsuit that has ever existed (probably). With Technobutter 3 exterior and Technobutter 3 Firewall interior, this wetsuit is super flexible and super warm. With a unique back-up water flushing system and a double taped seam exterior and interior, no water will be entering this suit. With a smoothie front and back panel, the wind won't stand a chance. The PyschoTech is built for the cold and ultimate durability out of O'Neill's wetsuit line and is super comfortable too.