US Coast Guard-approved. Lightweight Hydroprene material construction for softer comfort and more maneuverability. V-Flex sculpted back design moves with you. Ride-up tabs to readjust the jacket after you jump into the water. Durable construction: Hydroprene Material shell, PE foam, zipper and two 1.5-in. (3.81-cm) webbed, buckled straps. Dry ring for easy hanging after use.