Stay cool to the core. Coolmax yarns are engineered to move moisture away from your skin, to be fast drying and to enhance comfort. Legendary Darn Tough construction and performance fit assure that socks stay put and in place all day. No slipping. No bunching. No blisters. No hot spots. Full Cushioning around the entire foot and shin area makes these hiking socks ultra comfy and supportive. Still made in Vermont. Guaranteed for life.