Long hikes with a ton of gear dont scare away the Trekking Heavy Crew by Smartwool. Sold in a 3-pair pack. WOW technology offers a reinforced sole for excellent comfort and durability. Heavy, full-cushioned sock with excellent shock absorption, insulation and support under heavy loads. 3 x 1 ribbed cuff with a flat knit toe seam for added comfort. Elastized arch brace for added comfort and support. Style Number: SW0131P3 70 percent wool, 29 percent nylon, 1 percent elastane. Machine wash warm and tumble dry low. Made in the USA and imported.