Designed as a Type V life jacket with Type III performance, the Onyx Outdoor A/M 24 Automatic Manual Inflatable Life Jacket converts from automatic/manual to manual-only inflation. This life jacket is made of durable nylon ripstop fabric that resists tears and punctures and features a low-profile design that helps keep you cool in warm weather. For use with Onyx Outdoor Rearming Kit #1352. Includes a 25-gram cylinder. USCG approved.