Originally developed as artificial silk, viscose is soft to the touch because it is made from long smooth filaments. The smoothness gives it a cool feel on the skin. Viscose is an ideal fabric for underwear which is why we use it in our vests and undershirts.
Softer than Cotton
The cellulose molecules which make up the viscose filaments are hydrophilic, meaning they attract water. Pores in the fibre allow moister from your sweat to be absorbed into the fibre itself, keeping it away from your body and your shirt.
The thermal and sweat absorbing properties work best when in contact with your skin, so we design them to be body contouring but not tight. These technical details are what make our vests and undershirts into technical base layers.