The belt extender enables people with larger size requirements to use most Mustang Survival inflatable PFDs. Use of the belt extender voids the PFD's US Coast Guard approval unless the wearer has a chest size over 130 cm or 52 inches. In this case, wearing an adult universally-sized PFD with a clip-on body strap extension does not void the approval. For more details, see the "PFD's for people with larger than normal chest sizes" section in the USCG life jacket pamphlet. This extender belt does not fit inflatable PFD models with 2" webbing. This includes older models of MD3052, MD3054, MD3082 and MD3084 and any model whose lot number beings with a W. Key Features Adds 12” to waist belt Belt extender fits PFDs with 1.5” buckles Width of belt is 1.5”