The Long John's M's Lite from Woolpower is made largely from the soft natural fiber of merino sheep and is blended with a small proportion of functional fibers. This increases the durability and service life of the long briefs. The merino wool ensures odorless, scratch-free comfort and regulates the temperature and moisture balance. Only a few seams reduce friction enormously. The snug-fitting briefs keep you warm without letting the heat build up.