Experience durability at its peak with the PhD Outdoor Light Crew. Featuring Indestructawool technology, a wool-based durability construction, these hiking socks are ready for any adventure on your list. Plus, with body-mapped mesh zones, a Virtually Seamless toe, and our 4 Degree elite fit system, these ZQ-Certified Merino wool socks have comfort covered. The women’s-specific fit provides an overall slimmer fit and narrower heel.