Size Chart Smartwool's lowest cut sock yet, with a "hidden" height. This "secret" in your shoe is a non-cushioned no show sock that's perfect for ballet silhouettes and other flat shoes. Features: - Women's specific fit; narrower heel and slimmer fit - Minimal cushioning for maximum next-to-foot performance without added bulk - Sock Height: Hidden - Internal gripper at heel - Knit in Korea: 60% Merino Wool, 39% Nylon, 1% Elastane - Only available to ship within the USA - Last Chance: Discontinued Style