Light Cushioning makes it a perfect sock for hikers looking for a little less cushion. True Seamless construction provides a smooth, performance fit to assure there's no slipping, no bunching, and no blisters. With half the wool yarn weight of Darn Tough's cushion socks, Darn Tough's lightweight cushion socks deliver lightweight performance with the perfect amount of cushioning along the base of your foot, while 17.2 Micron Merino Wool delivers supreme comfort. Breathable and fast drying. This "all-weather" sock stays cool in the summer and warm in the winter, plus it's naturally antimicrobial so it repels bacteria and odor - a great feature when you need to get an extra day (or two) out of your socks. Still made in Vermont. Guaranteed for life.