Product Features: 1. 275N, Double Air Chambers, SOLAS Standard 2. Buoyancy loss: less than 5% after 24h 3. With Solar reflective tapes and whistle, easy to find in the wild 4. Light and comfortable, adjustable webings to fit different size 5. Reusable, easy for washing and air drying 6. For Marine work, life saving, Offshore Work 7. Ambient temperature for use: -30 - + 65