The O'Neill Reactor Vest is designed with anatomical flex points and expansion panels for a comfortable fit that will keep you skiing all day. This vest is made from closed-cell PVC marine foam and has a soft 100% polyester lining and Filter Tech outer shell. Segmented foam core and anatomical flex points keep you moving freely. Features concealed dual belt system with quick-release buckles and heavy-duty front zipper. USCG approved type III. Sizes: S(33"-36"), M(37"-40"), L(41"-44"), XL(45"-48"), 2XL(49"-52"), 3XL(52"-55"). Filter Tech outer shell and soft polyester lining Segmented foam core keeps you moving freely USCG approved type III Men's Reactor Life Jacket in Black size 3XL.