Form Plus wetsuit is available in 3 mm, 5 mm, and 7 mm thickness in men s and women s sizes. Men's model is black/gray and women's model is black/blue. Back-zip styling for good water sealing and a great ergonomic look and fit New extremely strechable neoprene and nylon jersey construction Smooth-cut neckline to provide unprecedented comfort compared with traditional roll-edged collars Double-blind-stitched outer and inner seams for durability and comfort Metal main zipper slider is sturdy yet easy to operate Integrated heavy-duty kneepads offer enhanced abrasion resistance Extremely-stretchable neoprene and Nylon Jersey construction Smooth-Cut neck line. Metal main zipper slider is sturdy yet easy to operate.