The Zeroweight Insulator cross-country shorts provide exceptional warmth. They are made from 91 percent recycled materials and feature Freudenberg's thermo insulation, which is produced from used plastic bottles. The high-waisted shorts are made from 4-way stretch jersey and fit comfortably over your tights. The knee-length design is perfectly tailored for Nordic skiing and keeps out the icy cold. You can store essentials in the concealed pocket at the waistband, and the full-length side zippers make it easy to put on and take off. When paired with long tights, they are suitable for cross-country trails as well as ski tours or winter runs in sub-zero temperatures. Enjoy maximum warmth and breathability on cold days.