The Castelli Distanza 20cm socks are designed with a merino wool blend to keep your feet dry and warm during your rides. The fabric keeps your feet warm during sport, while the effect of the wool allows you to wick away perspiration quickly.Features:- Leg cuff: 20 cm- Merino wool blend suitable for low temperatures- Thermal and quick-drying fabric- Arch support band- Nylon heel and toe for added durabilityTechnology:- Merino WoolMerino wool is one of the most appreciated fabrics for its quality and characteristics. Merino wool is obtained mainly from Merino sheep originating in New Zealand. This breed of sheep is found in many corners of the world, however the wool is recovered from the natural sheep of that country. The difference between these Merino sheep and those from the rest of the world is the skin, which is thicker to protect against extreme weather conditions. Due to the fineness of the fibre, Merino wool is much more pleasant on the skin.