HIGH PERFORMANCE THERMAL UNDERGARMENTS. FROM SWEDEN. Woolpower® is a collection of garments for the entire body that can be combined in different ways depending on temperature and activity. Woolpower® garments are made from Ullfrotte Original material. Everything is made in the factory in Östersund. Material comes in various weights, each of which has a different function and advantage. Woolpower® garments are available in 200, 400, 600 och 800 g/m².