Janus LightWool is an extra fine and soft single jersey quality which feels extremely light and breathable. These unique qualities make the garment ideal for use in spring and summer, as well as the perfect 1st layer during winter. The light quality has a cooling effect in hot weather, and feels warm to the skin on cooler days. The 100 % extra fine merino wool has a natural UV protection. The lightWool fabric is verified by Oeko-Tex® Standard 100 and contains no harmful substances for your skin.