Long hikes with a ton of gear don't scare away the Trekking Heavy Crew by Smartwool. ; 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. ; Materials: 80% Merino wool, 19% nylon, 1% elastane. ; Machine wash warm and tumble dry low. ; Sold in a 3-pair pack. ; Made in the USA and imported.