Socks GM Sport Alp Thermo Boot socks mountaineering socks are made of cashmere and merino wool to offer you the top of thermal comfort, protection and softness. You can use socks up to 3000 meters above sea level and for ice climbing outings. Extrafine merino wool, combined with cashmere, guarantees you not only excellent heat regulation but also resistance and durability. The length of the stocking is medium-high and reaches the calf, while the recommended use altitude is around 3000 meters. Calze GM Sport Alp Thermo Boot mountaineering socks