When you're planning a fun day out on the water with family, ensure your young ones stay comfortable in the O'Brien Flex Life Jacket. The vest is made from BioLite material that's lighter, faster drying, and more eco-friendly than neoprene. This US Coast Guard approved vest has a convenient zip closure and two adjustable chest straps to keep your kids locked in tight while they are having fun out on the water.. BioLite construction is soft, lightweight, breathable, and eco-friendly. Flex Fit stretches and wraps around body contours. Zip closure for easy entry and secure fit. Two concealed belts stay out of the way. Multiple front and side hinges enhance range of motion. Wide armholes improve mobility. Harmonized U.S. Coast Guard and Transport Canada Approved. Youth size: (55-85 lbs.)