Specifications: 1) Material: neoprene 2) Excellent heat preservation 3) Nice appearance 4) Custom designs welcome Inner packing: Polybag + gift box Outer packing: Carton Performance products: 1) Thermal performance: the wearer\'\'s body core temperature does not fall more than 20c after a period of 5 hours immersion in calm circulating water at a temperature of between 0 -20c 2) Buoyancy: more than 142N and the decrease of buoyancy is less than 5% after suberging in fresh water for 24 hours