Now you can put on the miles without fear of blisters or that crazy nagging in your boot with the Hiking Liner by Smartwool®. Sold as a three-pair pack. Lightweight, non-cushioned sock. Higher density impact zones with WOW™ Technology for longer lasting wool benefits and comfort. 1×1 ribbed cuff. Flat knit toe seam for added comfort. Materials: 64% Merino wool, 34% nylon, 2% elastane. Machine wash warm and tumble dry low. Made in the USA.