The most technical hiking sock, featuring built-in functions and functional threads. The polypropylene yarn helps maintain body temperature while being breathable and abrasion-resistant. It's perfect when you’re hiking and your body temperature rises. In addition to polypropylene, there's traceable merino wool that also helps wick moisture away and keep you warm and dry. Terry construction on the heel and toe for extra protection and comfort. Mesh panels on the top of your foot for improved ventilation, and ribbed panels around your ankle and foot for the best support and fit. The socks come in left and right for a perfect fit.