Life jacket, also known as life vest, is a life-saving clothing. It is designed like a vest and made of nylon fabric or neoprene, buoyancy material or inflatable material, reflective material, etc. The general service life is 5-7 years, which is one of the life-saving equipment on ships and aircraft. It is generally vest type, made of foam plastic or cork. Wearing on the body has enough buoyancy to make the head of the person falling into the water surface.