The Hike Light Cushion Crew by SMARTWOOL, formerly PhD® Outdoor, is designed to help take care of your feet and elevate every hike. The hike socks have been updated to include more sustainable materials, improved durability and mesh zones, and an even more perfect fit. The top SMARTWOOL sock technologies work with responsibly sourced, ZQ-certified Merino wool to help you perform—naturally. Recycled nylon brings more sustainability to the sock construction, while light cushioning along the entire bottom of the foot paired with a crew height helps you get there on the most rugged trails and in any hiking shoe/boot.