There are three common styles of swim vests: removable swim vests, non-removable swim vests, and nylon swim vests. Removable swim vests and non-removable swim vests are made of 88% neoprene and 12% polyester for the liner, 100% polyester outside, and stuffing EPE foam. With regard to the nylon swim vest, it is made of 100% polyester with EPE foam stuffing.

Neoprene includes the CR, SCR and SBR. Generally speaking, SBR is always used for a swim vest.

SBR is the abbreviation for Polymerized Styrene Butadiene Rubber. SBR is the backbone product of the rubber industry, is the largest general synthetic rubber variety, and is one of the earliest synthetic rubber varieties to achieve industrial production. It has excellent cushioning and thermal performance, but the compression performance is not so good. It is an important reason to pay great attention to the packaging of swim vests. Another reason is that SBR is more cost-effective than SCR and CR. Swim vests don’t require as much elasticity as the wetsuit. So SBR is more commonly used for swim vest.

Polyester is usually used for swim vest outside.

Polyester is a synthetic fibre created by the chemical condensation of organic dibasic acid and dibasic alcohol, which is a polymer molecule. Its creation dates back to the 1930s, and it is now the most significant type of synthetic fibre.