TextileGlossary.com

Layering involves the use of a comfort or base layer; an insulation layer; and a protection layer. The base layer comprises clothing worn next to the skin. Perspiration drying on the skin can cause chilling. However, this effect can be minimised by wearing a base layer which wicks moisture away from the skin. The insulation layer is the middle layer in the system and enables the wearer to regulate his or her body temperature by putting on or taking off garments as necessary. Insulation layer garments should be lightweight and warm, and should dry quickly in order to retain body heat. They should also let perspiration vapour escape from the comfort layer underneath, and retain their insulating properties even when wet. The protection layer is an outer layer of waterproof and windproof fabric. It should be highly breathable, so as to allow perspiration vapour to escape easily from the comfort layer and the insulation layer.