O'Neill Men's Assault Blue Life JacketThis O'Neill Men's Assault Blue Life Jacket is constructed with a lightweight fluid foam neoprene shell and an integrated lumbar pad that will eliminate any stress on your back. The 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 segmented foam core with anatomical flex points and overlock stitching, this men's life jacket will provide long lasting use and durability while the concealed dual belt system adds extra security.Features:Concealed Dual Belt SystemSegmented Foam CoreOverlock StitchingNytrolite FoamMinimal Bulk DesignFluid Foam Neoprene ShellIntegrated Lumbar PadClosed Cell Foam StructureLightweightAnatomical Flex PointsStrategic Armhole SizeUSCG ApprovedSizes:Medium:Chest Size: 37" - 39"Large:Chest Size: 39" - 41"X-Large:Chest Size: 41" - 43"XX-Large:Chest Size: 43" - 45"XXX-Large:Chest Size: 47.5" - 50.5"California Residents:WARNINGCancer and Reproductive Harm -P65Warnings.ca.gov