Size Chart A seamless opening on the Women's Premium Marl No Show socks is designed to help reduce pressure points and enhances comfort in your favorite low-profile shoe. To ensure your socks stay up all day, Smartwool has added an internal gripper at the heel to help create a secure sock fit. Enhanced comfort and premium construction will help you feel light on your feet all day. Features: - Women's specific fit; narrower heel and slimmer fit - Non-cushioned for maximum performance in close-fitting shoes - Sock Height: No Show - Virtually Seamless(TM) toe for enhanced comfort - Internal gripper at heel to secure sock fit - Seamless opening reduces pressure points and enhances comfort - Two-ply premium construction with lux hand feel - Supportive arch brace - Made in USA of Imported Yarns: 70% Merino Wool, 28% Nylon, 2% Elastane - Only available to ship within the USA - Last Chance: Discontinued Style