This Smartwool PhD Outdoor Light Mini 3-Pack of mini crew socks is perfect for tackling any trail in comfort. Mini crew cut. Sold in 3-pair pack. The PhD socks are packed with technologies that are designed to keep your feet comfy so you can focus more on the trail. 4-Degree Elite Fit System construction uses two elastics to provide better stretch and to keep your sock in place. Indestructawool is engineered to provide maximum comfort and durability. Mesh panels on the out step help provide added breathability. Ultra-light cushioning provides maximum performance with minimal cushioning to works well in close-fitted shoes. Branding on back of the cuffs. Style Number: SW000596 58 percent wool, 40 percent wool, 2 percent elastane. Machine wash, tumble dry. Made in the USA.