The undergarment of choice for drysuit diving, the K2 Extreme is the ultimate in cold-water thermal insulation, sporting a modern eye-catching design and one-piece steamer styling. For maximum thermal insulation, the undersuit is made of a breathable and stretchy dual fleece material. It includes compression padding on the shoulders, chest and knees for both comfort and warmth. The roomy hip pockets secure with zippers, and elastic wrist loops and heel straps enhance fit and prevent ride-up when donning a drysuit. The K2 Extreme can be counted on to always keep you warm and dry.