Smartwool PhD Run Ultra Light Mini Socks

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Designed for the minimalist runner, the SW165 (updated SW062) PhD Running Ultra Light Mini Height Sock is uber-lightweight, but incorporates all of the bells and whistles an injury-free, serious runner would need.

This particular style, the SW165, has mesh zones that address moisture and temperature regulation for Men, specifically. For the Women's version, please search SW062. The Ultra Light Running sock keeps your foot cool and dry while maintaining a snug fit, preventing blisters and sheering. When you want to feel liberated and forget that you are wearing a sock at all, Smartwool's SW165 Ultra Light Mini Sock is our recommendation. As with all Smartwool socks, the SW165 PhD Running Ultra Light Mini sock is itch free, washer and dryer safe.


  • Ultra Light
  • Non-Cushioned
  • Optimized for Running and Blister Prevention
  • Mini Height is equivalent to a Quarter Crew
  • 4 Degree Fit System uses complimentary elastane bands to keep socks in place comfortably and ensure consistent fit through continuous wear
  • ReliaWool Technology in high impact zones for longer lasting protection and durability
  • 3.75" overall height
  • Mesh vents specifically designed for male runners
  • Virtually seamless toe
  • Update to the SW062 (Unisex)


54% Merino Wool, 42% Nylon, 4% Elastane

Sock Height

Mini Crew Height Sock

Sock Cushion

Ultra Light Cushion Sock