What makes the Velocity Series of wetsuits special is the combination of three material types, each with their own stretch characteristics. This unique combo is called Progressive Stretch. Together, they probably make for the most comfortable, best-fitting suit Bare has ever engineered. Adjustable GLIDESEAL collar. 3mm torso with 2mm arms and lower legs. PROGRESSIVE STRETCH TECHNOLOGY. GLIDESEAL arm and leg gaskets. URASHIN: Protection with flexible comfort. Side ankle zipper with gusset. 100% flatseamed throughout.