The Women's Vertex No-Show Ultra Light socks with Cushion from Darn Tough are ideal for serious runners who need a little extra padding. The 1762s are incredibly light but still cushy and tough enough to help you on long mile treks. The True Seamless construction reduces hotspots and blisters and the ultra high stitch count creates a super comfortable sock with a streamlined fit - 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 when you're laying down the miles. These socks are tough, and the company backs up its word with an unconditional lifetime guarantee.