6% spandex 【BEST MATERIAL IN THE MARKET?: Highest merino wool content (55%).This is the most scientific proportion of ski socks. The high performance ski socks are made to last over many ski seasons 【ERGONOMIC DESIGN】：Hollow Fiber Structure Design makes an air protective layer. Reduce the impact force of ankles and calves to allow the ski socks to fit comfortably in skiing boots. 【ADVANCED WARM SYSTEM?: Advanced special yarns absorb natural body heat to provide enhanced thermal properties and superior warmth. Knee-high cushioned ski socks with stay-put knee, heel, toe, and shin. 【HEALTHY MANAGEMENT?: MUSAN skate socks have moisture management & Anti-odor function.Superior wicking property can keep your feet dry to ensure the socks don’t get heavy with perspiration or wet from snow while skiing.Thickening Curve Design promotes the circulation of blood. 【MUSAN’s LOVE?: Advanced technology and exclusive materials create the best quality of socks for your family.It is also suitable for the Old and Young people to keep warm in cold winter.Perfect GIFTS for CHRISTMAS!