Our best-selling base layer bottoms made from soft and breathable 100% merino wool jersey, the 200 Oasis Leggings are the perfect foundation for your cold-weather layering. 100% Merino wool (excluding waistband) - Soft, lightweight and naturally odour resistant fibre that keeps you warm when it's cold and cool when it's warm. Gusset for mobility and comfort. Flatlock seams to help reduce friction.