DBF-I-type insulation life-saving services: meet the SOLAS Convention, IMO regulations and the 1974 International Convention for the Safety of Life at Sea 1983, the amendment request. A watertight, thermal buoyancy and natural features. China Classification Society has received type approval and CCS certificate. This type of survival suit belonging to the natural thermal insulation immersion suits, underwear linked together. The jacket, with a lifeguard whistle, is a ship with international conventions of a personal life-saving equipment, applicable to all ships, marine engineering (including underwater construction, offshore marine salvage) operations. Wear less than 2min. Storage temperature: 30 ℃ below zero to zero on the 65 ℃. Use the appropriate temperature: 10 ℃ below zero to zero on the 30 ℃. Size: L-type size for those from 1.75 to 1.9 m tall. S-type size for less than 1.75 meters tall person. Insulation performance: the wearer from 0 to 20 ℃ calm water soaked 6 hours, the temperature drops below 2 ℃. Buoyancy, the wearer can stand up to the float 5 seconds position. To face up, mouth above the water at least 120 mm. Soaked in water for 24 hours, the buoyancy loss is less than 5% down, net weight 5 ± 0.5KG.