Smartwool PhD Outdoor Heavy Crew Socks

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Size Chart
Alpine Blue

Smartwool's SW001073 PhD Outdoor Heavy Crew sock is one of our favorite socks here at GoBros. With this sock Smartwool provides serious warmth and high-density cushioning, yet also gives us a fit that is never bulky and can be worn comfortably with causal and athletic shoes alike.

The addition of Indestructawool construction means these socks last longer. Like all Smartwool PhD socks, the Outdoor Heavy Crew promises a high-tech fit (this model includes the 4 Degree Elite Fit System which uses a elastic network to guarantee greater stretch and recovery) to comfortably keep your sock in place all day. The Heavy Cushion Outdoor Crew sock from Smartwool has a bump-free, virtually seamless toe seam for longevity, and comfort. Mesh Venting promotes breathability and moisture-management.

Smartwool's PhD Outdoor Heavy Full Cushion Crew sock is perfect for cold days on the trail or commuter train. Designed to manage moisture, regulate temperature, control foot odor to prevent blisters and keep you comfortable wear after wear.


  • Crew Height (8.5" overall)
  • Heavy Full Cushion
  • 4 Degree Elite Fit System for 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
  • Strategic Mesh Zones for Breathability
  • Virtually Seamless Toe
  • Washer and Dryer Friendly
  • Replaces the SW046


73% Merino Wool, 25% Nylon, 2% Elastane

Sock Height

Crew Height Sock

Sock Cushion

Heavy Cushion Sock