Designed with beginner triathletes and open water enthusiasts in mind, the Proton Fullsuit ensures a great level of flexibility, buoyancy and durability. Constructed using Y39 rubber, the main body of the Speedo Proton Fullsuit offers exceptional buoyancy to help minimise drag created by body immersion. Y38 features throughout the rest of the Fullsuit. This Neoprene rubber is a great all-rounder suitable for entry-level triathletes and open water swimmers. It helps to ensure flexibility and buoyancy so that you can move freely and comfortably. With superior durability, it allows you to compete and train with full confidence that you can go the distance. Maximotion+ features in key areas across the suit. These areas use 1.5mm Neoprene panels that help to provide additional flexibility where you need it most whilst other specific areas feature thicker Neoprene sections. Thicker Neoprene ensures thermal insulation and extra buoyancy. A fused neck design offers a comfortable fit with a watertight design and a rear zipper means that the Fullsuit is easy to put on and take off in a hurry.