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Smartwool Indestructawool™ Women's PhD Outdoor Approach Mini Crew

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Close your eyes and imagine an approach/hike sock designed by an iconic alpinist.  Imagine this sock is manufactured by the worlds leading sock producer.  Just think what this sock would feel like and perform like if it was made from the finest New Zealand merino wool engineered with achilles and ankle protection like no other.  Now open your eyes and feast open the latest creation by Smartwool in partnership with alpinist Conrad Anker. 

The PhD Outdoor Approach sock is designed to handle demanding approaches, day hikes and everyday wear. Featuring Indestructawool™, 4 Degree™ elite fit, the Approach socks are made to scramble over rocks while wicking moisture away, thanks to Merino wool.  Designed to fit seamlessly in approach or hike footwear, these socks offer the fit, comfort and durability to handle anything your day can throw at it.

Indestructawool™ is more than a fabric, it's a design system developed so that you will have a sock with greater breathability, longer lasting wear (33% better durability than any PhD sock before it) and miles and miles of comfort.  All to satisfy yourepic adventures.

Still packed with:

  • Women's specific design and fit
  • 4 Degree Elite Fit System that uses two elastics in construction for greater stretch and recovery.  That means these socks are not moving any time soon.
  • Ankle band, Upper and Lower instep band, Arch brace.
  • Strategically placed mesh ventilation zones for temperature and moisture management.
  • Smartwool's signature Virtually Seamless™ toe
  • Deep heel pockets
  • Medium full cushion

Materials - 65% New Zealand Merino Wool, 33% Nylon, 2% Elastane

Made in USA

Smartwool Adult Sock Sizing Chart


US Men’s

US Women’s










Extra Large