The Restube rescue system was designed for all water sports (SUP, Paddle, Kite, Wind, Sailing, Swimming, ...). Extremely compact it is worn on the belt (Harness Possibility with Sports3 version) without the slightest discomfort . In need of need just shoot the handle (handle also used as a distress whistle) and the buoy swells in a few seconds thanks to the CO2 cartridge (interchangeable), providing you with floating support. and made in Germany- in inflated condition the Restube has a buoyancy of 70 Newtons. - Supplied with a spare cartridge. - has a whistle. - Weight 280 grams. - Deflated dimensions: 14 x 7 x 5 cm. - inflated: 70 x 22 cm.- Do not replace a life jacket