The Thriller warm socks are just amazing, they will blow you away! A high end COMPRESSION sock with a lot of merino in it, this combo is just fantastic. Once you start using them they will stay your best friend, skiing, snowboarding, running, cross-country, just ask any of the Kask friends ant they will let you know the difference!The merino wool keeps the foot perfectly warm & comfortable without clamminess and stinky smell. One of the worlds most environmental friendly socks made in Sweden. Bluesign merino wool. 30% MERINO 29% POLYAMIDE 37% POLYPROPYLENE 4% ELASTANE