Choose the performance, strength, and comfort of certified ZQ merino wool from responsible sources with our hiking socks Light Cushion Crew. Previously known as PhD Outdoor, our best hiking socks have been revamped with more sustainable materials. Featuring recycled nylon, they are stronger, better fitting, and even more breathable thanks to mesh zones. But don’t worry. The technologies that make our socks successful are still in place, giving you all the comfort and performance you expect from Smartwool. Their Crew height also offers better protection on the trails, while light cushioning throughout the bottom of the foot keeps you comfortable even on tough terrain for long hikes. Indestructawool technology with extended durability zones 4 Degree Elite fit system for a performance-oriented fit Mesh zones for increased breathability Virtually Seamless toe for enhanced comfort Ribbed cuff that stays in place for added comfort Weight: 0.072 kgs Country of manufacture: United States 58% merino wool, 40% nylon, 2% elastane Do not use bleach. Do not dry clean. Tumble dry low. Do not iron. Wash inside out. Machine wash in cold or warm water. Gentle or delicate cycle. Tumble dry low.