Loading... Please wait...U.S. Coast Guard Approved Type III. 1-1/2” Belt/Buckle DesignHeavy duty zipper closure. PVC foam construction1.5 mm neoprene fabric outer Flex-Fit Insert. Constructed of FUA fabric that stretches like spandex and provides an improved fit. Wide arm holes offer freedom of movement. Adult medium 38-40 inch chest size, Blue.