Stearns offers reliable protection for the toughest jobs with the Welders Heavy-Duty life jacket. A tough fiberglass shell encases the Aquafoam flotation that retains buoyancy even when punctured for durable reliability on the water. The breathable, inner mesh lining wicks away excess moisture keeping you cool. Large armholes offer increased mobility while adjustable sides help secure a better fit without restricting your movement. Impressive contouring gives you a flexible and comfortable fit while the Vislon zipper is designed to stay up so you wont have to worry about your life jacket moving around while you work. Key Features Fiberglass shell for tough protection Large armholes for enhanced mobility Adjustable side tables for a customized, secure fit Marine mesh inner lining for cooling comfort Specifications USCG Approval Type:Type III Intended Use: Welding, industrial, commercial Buoyancy: 15.5lb. Flotation Material:Aquafoam Shell Fabric: Fiberglass Straps: Adjustable side tabs Closure:Heavy-duty Vislon zipper Warranty: Limited More information For more information on USCG approval types and why you should always wear your life jacket when you are on a boat, see Think Safe Choose the Right Personal Flotation Device (PFD)”.