The highly technical Reactor II wetsuit is engineered for performance. The perfect combination of stretch and durability, the Reactor features an updated style that's built to last. Back-zip system provides easy entry and exit and includes a watertight seal. Fluid Foam and Ultraflex technology means it offers the ultimate in stretch and flexibility in a super soft neoprene construction. Double super seal neck is fully adjustable. Wind-resistant suit with Flatloc-stitched breathable seams. Features 2mm neoprene throughout the suit. Fluid Foam & Ultraflex construction Flatlock stitching & breathable seams | O'Neill Men's Reactor II Spring Wetsuit - Black/Blue - XL