SmartWool PhD Outdoor Ultralight Mini Sock (3-Pack)
SmartWool PhD Outdoor Ultralight Mini Sock (3-Pack)

From Paige Dolan, Ultralight Community: “I’m happy to bring you our first-ever drop from SmartWool! Many outdoors enthusiasts are familiar with this brand. Made in the USA from the world’s finest merino wool, these socks are designed for comfort and performance. I have several pairs of SmartWool socks and they’re a staple item for whatever activity I’m doing.”

Light Multisport Socks With Merino Wool

Great for hiking, trail running, and any time you want your feet to stay cool, the SmartWool PhD socks are so named because they’re built for performance—to the highest degree. Each pair is made of merino wool for breathability, temperature regulation, and moisture and odor management, with nylon for durability and a splash of elastane for stretch. Their 3.75-inch height strikes the perfect balance between a low profile and debris protection, while the 4 Degree elite fit system keeps your socks securely in place as you move. Every sock boasts mesh ventilation zones and minimal cushioning, and the women’s socks have a slimmer overall fit with a narrower heel.

Note: This drop includes three pairs of socks. At checkout, you’ll have your choice between the men’s socks in charcoal, dark blue, or light loden (M–XL); and the women’s socks in dark blue (M–L), fossil (S–L), or light gray heather (M–L).

SmartWool PhD Outdoor Ultralight Mini Sock (3-Pack)
SmartWool PhD Outdoor Ultralight Mini Sock (3-Pack)
SmartWool PhD Outdoor Ultralight Mini Sock (3-Pack)

Style Options

Men's, Charcoal
Men's, Dark Blue
Men's, Light Loden
Women's, Dark Blue
Women's, Fossil
Women's, Light Gray Heather

Sizing Chart

SmartWool PhD Outdoor Ultralight Mini Sock (3-Pack)


  • SmartWool
  • Fabric, most styles: 48% merino wool, 47% nylon, 5% elastane
  • Fabric, women’s fossil style: 50% merino wool, 46% nylon, 4% elastane
  • Virtually Seamless toe
  • 4 Degree elite fit system
  • Indestructawool technology
  • Mesh ventilation zones
  • Minimal cushioning
  • Height: 3.75 in (9.5 cm)
  • Machine wash on warm/gentle cycle, tumble dry low
  • Made in the USA


Domestic orders will be shipped by Massdrop.

Estimated ship date is May 17, 2017 PT.

After the drop ends, payment will be collected. To deliver the best value to the group the request will then be submitted to the vendor up front, making all sales final. Be sure to check the discussion page for updates.

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