O'Brien M16 Inflatable Belt PackThe O'Brien M16 Inflatable Belt Pack is a universal-fit inflatable flotation device. The minimalist design focuses on performance and staying out of your way all while remaining a US Coast Guard Approved safety device. Utilizing a CO2 cartridge, simply pull the cord to inflate the jacket, position it in a comfortable position and float on. This is a lightweight, compact way to stay safe out on the water without the hindrance of a full chest life jacket. Chest Size: 30"-52"; CO2 Cartridge Inflation; Minimalist desing;