The O'Brien Flex V-Back Life Vest provides comfort and safety for all types of water activities. Designed with multiple hinge points for a comfortable fit, the vest features a split V-back stretch panel and wide armholes to increase mobility and comfort. Zip closure and 2 concealed belts offer a secure fit. USCG approved.• Neoprene outer for comfortable fit• Flex Fit design stretches and wraps around the contours of your body• Split V-Back stretch panel for maximum maneuverability and comfort• Zip closure for an easy entry and secure fit• Two adjustable belts will stay out of the way• Multiple front and side hinges enhance range of motion• Wide armholes improve mobility• U.S. Coast Guard approved type III• Chest sizes: XS(28"-32"), S(32"-36"), M(36"-40"), L(40"-44"), XL(44"-48"), 2XL(48"-52") Split V-back stretch panel & wide armholes increase mobility Zip closure & 2 concealed belts for a secure fit USCG approved type III | O'Brien Men's Flex V-Back Neoprene Life Vest