This O'Neill Men's Assault Black Life Jacket is designed for extreme comfort with its Nytrolite foam construction. This foam is 3 times lighter than regular PVC foam and it will absorbs 15-20% less water due to its closed cell foam structure. With a lightweight fluid foam neoprene shell and an integrated lumbar pad, this men's life jacket will eliminate any stress on your back. The segmented foam core with anatomical flex points and overlock stitching makes for long lasting use and durability while the concealed dual belt system adds extra security.