The Darn Tough Vertex No-Show Ultralight Cushion Socks are highly rated for women's ultrarunning. These socks are made from a blend of merino wool and synthetic fibers, providing exceptional comfort, moisture-wicking properties, and odor resistance. The ultralight cushioning offers just the right amount of support without adding bulk. The seamless construction eliminates friction and irritation, ensuring a blister-free running experience. These socks have a no-show design and stay in place during intense workouts. The Darn Tough Vertex No-Show Ultralight Cushion Socks are renowned for their durability and come with a lifetime guarantee, making them a reliable choice for ultrarunners.