Xcel 2017 Men's GCS Full Wetsuit Back Zipper: Traditional back zipper for extra easy on/off Texture Skin: Texture embossed rubber that provides excellent wind resistance; ideal for outer chest panels hoods, and other areas that would otherwise lose warmth quickly Flatlock Seams: Durable, comfortable 7 thread seam construction lies flat and smooth against your skin DuraFlex Knee Panels: Comfortable, durable knee panels that stretch with you