life vest

 1)After 24 hours immersion in water, buoyancy loss should be less than 5%.
Buoyancy material: Polyethylene foam
2)Marine life jackets DF86-3/DF86-5 work
3)Categories of personnel for the work of coastal and river use
4)Buoyancy is greater than 75N. Immerse in water for 24 hours, the buoyancy loss should be less than 5%.
5)Buoyancy material: Polyethylene foam