Do what feels natural in Smartwool's new Hike Light Crew sock. Formerly known as PhD® Outdoor they've added enhanced features to their responsibly sourced ZQ-certified Merino wool socks to help you stay comfortable breathable and able to hike any way you like. Improved durability and mesh zones work together with the brand's top sock technologies to bring you a wool hiking sock capable of climbing it all. Light cushioning along the entire bottom of the sock brings more comfort to your favourite hiking shoes or boots.