Perform with the power and comfort of responsibly sourced, ZQ-certified Merino wool in the Hike Light Cushion Crew socks by SMARTWOOL. Formerly known as PhD Outdoor and newly updated, these socks include more sustainable materials with the addition of recycled nylon, improved durability, updated mesh zones, and an even more perfect fit. SMARTWOOL continues to offer fan-favourite sock technologies that give you the comfort and performance you expect. The crew height adds extra coverage on the trails and light cushioning on the entire bottom of the foot helps keep you comfortable when the ground isn't. The socks feature Indestructawool technology with extended durability zones, a 4 Degree elite fit system, additional body-mapped mesh zones for added breathability, and a virtually seamless toe for enhanced comfort. They are knit in the USA of imported yarn, with 56% of the yarn being from the USA.