The Smartwool Secret Sleuth is the lowest-cut non-cushioned "No Show" sock that's perfect for ballet silhouettes and other flat shoes. The sock features an internal silicone heel gripper that keeps the socks in place, a seamless opening to help prevent pressure points, and a supportive arch brace that enhances comfort. The women's specific fit sock includes Shred Shield® to help reduce wear from toes. It is made of 60% Merino Wool, 38% Nylon and 2% Elastane. All Smartwool socks are proudly made in the USA, and carry a lifetime guarantee.