Smartwool Striped Running Socks Without Cushioning. This low ankle sock, thanks to the many Smartwool technologies, provides comfort, performance, breathability and wear resistance. Features: Indestructawool TM technology for better durability. ⁴ Degree TM Elite Fit design for a customized, performance-oriented fit. Shred Shield TM technology to reduce wear at the toe. Mesh areas for extra breathability. Virtually Seamless TM toe for comfort. Specially designed for women. Heel tab prevents the sock from sliding into the shoe. Fabric: ⁵³% merino wool, ¹³% nylon, ³⁰% recycled nylon, ⁴% elastane.