The Darn Tough Vermont No Show Light Cushion Sock Women's is a great running and biking sock, because when you boil it down, what makes a great cycling sock is exactly what makes a great running sock: a blister free foot hugging fit. This open mesh sock is designed with the discerning roadie, mountain biker, road runner and trail runner in mind. Made with Merino wool it has reinforced heels and toes for miles of durability and knit in arch support for precision fit and increased endurance. Our socks will enhance the fit of your shoes, eliminate blisters and won't wear out. No Show Height Open mesh knitting on top of foot. Reinforced heel and toe. Elastic support around the arch. Ultra light yet extremely dense sock Undetectable toe seem 51% Merino Wool, 45% Nylon, 4% Lycra Spandex.