"Selected high quality wool is suitable for all seasons. Being Functional & Fashionable and achieve the best performance. High density knitting creates great cushioning and fitting. Pile cushion on sole. Gradual compression and Arch Band at the midfoot keeps a comfortable, close fit even for long hours of activities. Anatomical left and right construction is designed for a more natural fit. Mesh fabric at the top of the foot offers ventilation. High quality merino wool provides soft and gentle feel, no prickly irritation. Wool is naturally breathable down to the fiber level so cool in summer and warm in winter, material acts like ""air conditioner"" and can be worn all year around. Also wool is highly odor resistant due to natural, anti-microbial properties. Wool 65%, polyester 17%, nylon 13%, polyurethane 5% Made in Japan, Koryo, the Town of Socks"