IST 3mm Stylish tropical scuba diving or snorkeling neoprene shorty blue - Mens 3mm Nylon II neoprene construction for stretch, flexibility and insulation Super stretch panels at armpit and Lycra panels at waist and neck increase range of motion Adjustable Velcro sleeve openings minimize water seepage Flat lock stitching throughout to reduce seam irritation Multi-panel, form-fitting construction for comfort and mobility