LightWool Longs are very thin, soft long underpants. The pants insulate very well under the top layer on cold days and keep you cool on warmer days. They are suitable for more demanding activities where you sweat. Such as skiing, alpine skiing, mountain hiking, cycling and running. LightWool is a specially developed soft and light material for warmer days. Wool insulates against heat from the outside and therefore cools on days with higher temperatures. It is a material that ventilates and regulates body temperature according to activity. LightWool is ideal for long trips and wool is naturally odor resistant. Simply dry and air the garment and you can reuse the pants.