Finally a light cushioned sock that's... darn tough. The Hiker Aztec is perfect for hikers looking for a little less cushioning. 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 their cushion socks, these lightweight cushion socks deliver lightweight performance with the perfect amount of cushioning along the base of your foot, while 17.2 Micron Merino Wool deliver 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.