A favorite of through-hikers and day-trippers alike, the PhD® Outdoor Light packs some serious trail power. Featuring a versatile, multi-sport design, this lightweight style includes Indestructawool™ technology for ultimate durability in high wear areas. And when it comes to comfort, Smartwool pulled out all the stops: the 4 Degree™ elite fit system provides a dialed fit and our signature Virtually Seamless™ toe offers extraordinary comfort in any trail shoe. The mid crew silhouette sits at an ideal height for a low trail boot while the women’s-specific fit provides an overall slimmer fit and narrower heel.
PhD® - Built for Performance in the Highest Degree
4 Degree™ Elite Fit System - For a dialed, performance-oriented fit with flex zone at ankle joint
Indestructawool™ technology features a patent-pending construction method for exceptional durability and comfort
Light Cushion - The ideal cushion for varied trail and road terrain
Body-mapped mesh zones for added breathability
Virtually Seamless™ toe for enhanced comfort
Women's specific fit: narrower heel and overall slimmer fit