An ankle-high powerhouse, the PhD® Outdoor Light Micro is made for mileage. Great for long summer treks, our lightweight, best-fitting hiking sock combines support, stretch, and recovery. Featuring Indestructawool™ technology for ultimate durability and the 4 Degree® elite fit system for a dialed fit. Light cushioning offers impact protection on the road or trail, while the Virtually Seamless™ toe offers more comfort in a trail shoe.