Adult, Chest Size: 34″-52″. Aquafoam flotation foam retains buoyancy, even when punctured. Compatible with most types of fall protection harnesses for added safety. 3M Scotchlite SOLAS – grade reflective strips on the front and back improve visibility. Dual encircling belts with snag-resistant buckles securely adhere to the body. Self-extinguishing construction reduces fire danger risks. Delrin snap hooks and D-ring for added convenience. 17.5 lbs. of buoyancy. USCG Approved Type V.