wetsuit inner The underlayer hyper warm for wetsuits that provide optimal heat retention, and keeps the cold out when layered. In addition, the 0.3mm chloroprene panel is laminated with THERMO LIGHT V2 material with excellent heat retention, which reflects heat energy emitted from the body and keeps you warm and dry. It also features a lightweight, stretchy, woven material that is slit to provide support with a fit and feel. It allows you to perform at your best.