Product Description Darn Tough (Style #1466 Mens Merino Wool Micro crew Hiker Sock With cushion - Denim, Medium High density cushioning on foot bottom custom shrink treated Merino wool Reinforced heel and toe Elastic support at arch Ring toe construction for a comfortable, invisible seam Leg is non-cushioned, wide ribbed, A height California Prop 65 Warning : This product can expose you to chemicals including arsenic, which is known to the State of California to cause cancer. For more information visit to the website.