Excellent durability for rugged outdoor fun and comfortable for younger feet. These Kids\' WoolFusion Trekker Socks will make a real difference to those first outdoor adventures. The blend of merino wool and Endurofil fabric balances softness, sweat-wicking and tough abrasion-resistance.Midweight blend of merino wool and Endurofil for a balance of softness, natural wicking and abrasion-resistanceLycra stretch constructionExternally reinforced for durabilityCalf height