Performance Thermal socks with merino wool regulate temperature, wick-away moisture, and reduce odor. These made in the USA mid-length socks have a seamless toe closure for comfort and reinforced heel for abrasion resistance. Mesh instep provides breathability and cushioned foot bed provides all day comfort. Rib top holds sock in place. Machine washable. Performance Thermal Socks are Made in USA with Merino Wool for temperature regulation, moisture wicking and odor reduction Mid-length socks have a seamless toe closure for comfort Reinforced heel for abrasion resistance Mesh instep for breathability Cushioned arch support for all day comfort Made in USA with global components Includes 1 Pair of Machine Washable Thermal Socks Klein Performance Thermal Socks - Large (1 pair) 60508