Over 25 years ago, Smartwool invented the original Merino wool performance sock – the Classic Hike. The Classic Hike remains mostly unchanged and certainly unmatched in comfort, but it's had an upgrade with recycled and sustainably sourced contents.Features:Responsibly sourced, ZQ-certified wool:Grown with a focus on ensuring environmental, social, and economic sustainability while also taking the best care of the Merino sheepProvides comfort and odour-controlVirtually Seamless™ toe – Smoothed out toe seams for ultimate in-shoe fit and comfortElasticised arch brace for secure fitLight cushion – Cushioning on the entire bottom of the footCrew heightMaterials:Light Gray: 65% Wool, 34% Nylon, 1% ElastaneAlpine Blue: 65% Merino Wool, 25% Recycled Polyamide, 9% Polyamide, 1% ElastaneCare instructions:Machine wash warm gentle cycleDo not bleachDo not ironDo not dry clean