These socks are seriously comfortable, with the ultralight cushioning of Merino wool/synthetic fibers for all-weather comfort. Patented Targeted Compression provides superior comfort and support for all-day movement in the High Sierra. Anatomical left and right design help to reduce blisters by improving fit, and high impact areas are bolstered by cushioning. The eliminated toe seam keeps you from irritation and the 3” length at the heel provides the perfect degree of protection from mud, dirt, and rocks.