These all-round socks are perfect for daily use, casual sports like jogging and the gym, and outdoor activities like camping and light hiking. They are made of shrink-proof merino wool that can be washed in a home washing machine. The thin line around the ankle is woven with reflective thread, improving safety at night . Nylon thread is woven in together to make them even tougher. The two stripes are slightly thinner, making them easier to incorporate into everyday fashion .