This is the Aqua Lung 3mm Mens Hydroflex Scuba Diving Wetsuit Features: Environmentally friendly features: 3mm high quality non-petroleum-based neoprene uses a PAH free formula Flatlock stitching for comfort against bare skin V-shaped collar for better comfort Laminated chest panel for wind and abrasion resistance O-ring seals on the wrist and ankles to limit water entry Powertex knee panels allow excellent abrasion resistance with the added bonus of increased flexibility Printed design on the shoulders to protect against abrasion from the BC Printed design on the wrist to help keep dive computers in place Loop on the zipper for ease of opening and closing The HydroFlex 3mm wetsuit features super-stretch neoprene, stretching up to 250% more than standard neoprene, providing added comfort in the water as well as when taking the wetsuit on and off. In addition to the stylish, coral-reef inspired design, the HydroFlex 3mm wetsuit provides exceptional performance for comfortable underwater exploration.