The Darn Tough Vertex No-Show Ultralight Cushion Socks are highly recommended for women's ultrarunning. These socks are made with a blend of merino wool and synthetic fibers, providing excellent moisture management and odor resistance. The ultralight cushioning offers just the right amount of support without adding bulk. The no-show length is perfect for wearing with running shoes. These socks also feature a seamless construction for added comfort. With their durability and performance, the Darn Tough Vertex No-Show Ultralight Cushion Socks are a top choice for ultrarunners.