Wet suits are the most commonly used wetsuits. 

They are made of foamed rubber and generally have a thickness from 1.5mm to 10mm or more. The infiltrated cold water is isolated by the clothes and will not penetrate out again, and will quickly become heated by body heat conduction. The isolation of inactive air bubbles can prevent the loss of body heat, and the fitted wetsuit can reduce the flow and exchange of internal and external water as much as possible, and the isolation effect is better.

Secondly, the wetsuit must fit well. The less the exchange of seawater and the outside world between the wetsuit and the body, the better the thermal insulation effect of the wetsuit. The most common wetsuit fabrics are nylon and lycra. The central lining of these two fabrics is foamed rubber, so as long as the thickness is the same, the wetsuits made of the two fabrics have the same thermal effect.

This wetsuit is made of foamed rubber or nylon cloth and is worn close to the body. Wetsuits must fit snugly against the skin, and the small amount of incoming water is immobile between the suit and the skin to maintain body temperature.