Thru-hikers logging hundreds of miles on the Appalachian Trail have long sung the praises of this sturdy sock. We built it to withstand the worst conditions the great outdoors can dish out. Legendary performance fit with solid cushioning along the bottom of the foot offers comfort without the bulk. No slipping, no bunching, no blisters. Fine gauge Merino Wool makes this a fast drying and breathable "all weather" sock that stays cool in the summer and warm in the winter. And since Merino Wool is naturally antimicrobial this sock repels bacteria and odor, which comes in handy when you need to get an extra day (or two) out of your socks. Still made in Vermont. Guaranteed for life.