Osprey Adult Zipped Wetsuit Boot 5mm The Osprey 5mm Wetsuit Boot is a low profile neoprene boot that is suitable for most water sports. From kayaking, surfing, jet skiing, sailing, driving, and bodyboarding, the Osprey wetsuit boot offers maximum comfort and warmth. Utilising an insulating 5mm neoprene and soft Nylon inner shell, the book holds a thin layer of water between your skin and the neoprene, reflecting your own body heat back and keeping your feet warm. The reinforced toe and heel and secure zip fastener also make these boots even more comfortable to wear, even over long periods of time. 5mm Neoprene CR Foam and Nylon inner shell fabric Vulcanised sole and reinforced toe/heel YYK Zip with gusseted entry Blind Stitched and Glued Seams