Smartwool PhD Outdoor Light Mid Crew Socks

Size Chart
Alpine Blue

Smartwool PhD Outdoor Light Mid Crew sock is built using Indestructawool technology for durability and longevity. Designed to manage moisture, regulate temperature, control foot odor, and prevent blisters so you can focus on the trail.


  • Mid-Crew Height (6" overall height)
  • Light Half-Cushion
  • 4 Degree Elite Fit System for an all-day performance fit
  • Indestructawool technology features a wool-based, patent-pending yarn and construction method for exceptional durability and comfort
  • Smartwool inside for moisture, temperature, and odor control
  • Ventilation ensures maximum breathability, thermoregulation, and moisture management
  • Virtually Seamless Toe


57% Merino Wool, 40% Nylon, 3% Elastane

Sock Height

3/4 Crew Height Sock

Sock Cushion

Light Cushion Sock