The Seac Alfa 5.0 is a 5 mm neoprene diving suit perfect for diving in cooler waters. At the joints there are inserts in super elastic neoprene that help facilitate movement. Knees and shoulders, areas that are traditionally more subject to stress, have been reinforced with anti-abrasion polyurethane inserts. The Seac Alfa 5.0 is a one-piece wetsuit that is easy to put on and take off thanks to the durable rear vertical zip. The AquaStop System uses soft Smooth Skin smooth neoprene on the neck, wrists and ankles to prevent water from entering.