Some of our best fitting, most advanced run socks yet—we've packed years of testing, prototypes, and running smarts into these ZQ-Certified Merino wool socks. Featuring Light Elite cushioning in the ball and heel of the foot to help maximize comfort with minimal in-shoe volume, body-mapped mesh ventilation zones, and a Virtually Seamless™ toe, this running socks is ready to keep up with you. 

Smartwool PhD Run Light Elite Micro Socks Ocean Abyss Large

  • PhD®

    Built for Performance in the Highest Degree

    Women's Specific Fit

    Women's specific fit; narrower heel and slimmer fit

    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

    Mesh Venting

    Mesh ventilation zones provide optimum moisture management and maximum breathability

    Light Elite Cushioning

    Maximum impact protection with targeted cushioning on the ball and heel of the foot. Designed specifically for runners.

    • Sock Height: Micro
    • Virtually Seamless™ toe for enhanced comfort
    • Achilles tab designed to prevent sock from slipping down into footwear
    • 1.5" overall height
    • Made in USA of Imported Yarn: 56% Merino Wool, 41% Nylon, 3% Elastane


    • Machine Wash Warm, Wash Inside Out.
    • Do Not Bleach.
    • Tumble Dry Low.
    • Do Not Iron.
    • Do Not Dry Clean.
  • Small: Womens Shoe 4-6.5

    Medium: Womens Shoe 7-9.5

    Large: Womens Shoe 10-12.5