A smarter back entry fullsuit, with the short zipper offset 2" from the center rear neck. This keeps the zipper pressure off your spine and allows for greater vertical stretch and comfort. A Water Barrier inner dam rests between your skin and the outer back zip, adding warmth and reducing water flow. A SmoothSkin lined Velcro wrap collar closes over and protects the zipper pull. The durable zipper construction also features glued and blindstitched zipper flaps, and a reinforced zipper base. The sleeves feature our UltraStretch Fusion Seams - high-density, stretch seams with inner Fusion Seam taping to maximize flexibility and keep more water out. UltraStretch Pressure Bonded taped seams are found in the chest, lower body, and legs, where more durability is required. All seams in the OS are double glued, blindstitched, and curved to match natural body contours, maximizing strength and stretch. The front and back chest feature wind-resistant Texture Skin for warmth. Contoured 4-way stretch DuraFlex knee panels add durable flexibility.