Single Air Chamber Lifejacket Characteristics And Main Technical Parameters Single air chamber lifejacket is designed and Produced according to European Standard EC Directive 89/686/EEC , EN ISO 12402 ? 9/2006 and relevant requirements of MSC.81(70). It consists of one air chamber which be made of TPU nylon composite material, automatic (or manual) inflation device, CO2 cylinder, oral inflation tube and outer cover etc. In emergent situation when falling info water, it can be inflated by the automatic inflation device within five seconds or by manually pulling the toggle so as to ensure safety of the drowning people. It has the advantages of small volume, light weight, comfortable to wear, easy to use, It?s suitable for offshore operation personnel?s lifesaving use. It?s also used as personal protective sportswear. ZHAQYT- 1012 is designed especially for fisherman and it is approved by Register of Germanischer Llyod AG (GL).