This Helly Hansen Alpine Merino Wool Blend Sock with medium insulation is a great sock with a yarn mix of traceable merino wool combined with polycolon and polyamide. The merino wool provides a great insulation while the lightweight yarn, polycolon, is breathable and sweat repellent. Perfect to hit the slopes in this style, featuring a full terry sole for protection and comfort while you have the ventilation mesh on top foot. Socks comes in right and left to give you the perfect fit.