Let fun reign! Snow time is the best time, especially with Smartwool???s Wintersport Stripe socks. Double-layer jersey knit construction provides extra warmth, while the Merino blend helps regulate temperature during the most active snowplay.. . 73% Merino Wool, 25% Nylon, 2% Elastane. Light cushioned shin and sole for impact absorption and warmth. Flat knit toe seam. Sock Height: Over the Calf. Machine Wash Warm, Wash Inside Out. Do Not Bleach. Tumble Dry Low. Do Not Iron. Do Not Dry Clean.. Made in USA of Imported Yarn.