The O'Neill Psychofreak 3.5/2.5 wetsuit will help keep you comfortable in cool temperatures so you can pursue the waters that are calling your name. Helps eliminate evaporative heat loss and protect against hypothermia if you capsize in chilly water. Stretchy 3.5/2.5mm neoprene forms to your body for a flexible, comfortable fit; flatseam construction prevents chafing. A silicone-based urethane seal minimizes water entry along both sides of seams, increasing durability and enhancing performance. Front and rear XDS Air Firewall neoprene panels increase insulation with a soft, moisture-wicking lining; additional panels on front thigh and hips enhance comfort. Stretchy neoprene panels in the arms, shoulders and lower legs promote unencumbered motion. Double neck seals reduce water entry and feel comfortable against skin. Collar protects skin from zipper abrasion; internal neck seal blocks water and funnels it through a drain hole to help keep you dry. Abrasion resistant, durable knee pads increase the life of the wetsuit. External key pocket with loop is easy to access and offers excellent security. Seamless paneling under sleeves promotes unrestricted motion and won't irritate your skin. Sealed wrists and ankles restrict water entry; redesigned cuffs prevent expansion and ballooning of sleeves. Hand wash in cold water, drip dry out of sun and store in a cool, dry place.