This O'Neill Women's Mist Slasher Life Jacket is composed of Nytrolite foam with a segmented foam core and an integrated lumbar support pad. This makes the jacket extremely warm and comfortable as well as eliminates any stress on the back. With drain holes, a front zipper and quick-release buckles, it provides added safety to anyone who wears it. This reversible women's life jacket is built for long lasting use and extreme durability.