Smartwool Running Sock With Targeted Padding. Thanks to Indestructawool technology, this low ankle sock is reliable. It fits perfectly on women's feet and promotes breathability. Its merino wool fabrication ensures you great comfort while resisting odors. Features: Indestructawool TM technology for added durability. ⁴ Degree TM Elite Fit design for a custom, performance-oriented fit. Mesh zones for extra breathability. Virtually Seamless TM toe for comfort. Specially designed fit for women. Achilles tab prevents sock from slipping into shoe. Fabric: ⁵⁶% merino wool, ²⁸% nylon, ¹³% recycled nylon, ³% elastane.