Smartwool PhD Outdoor Heavy Crew Socks


Sold Out
We'll tell you when there's more:


Add to CartUnavailableNotify MeSpecial Order
, - (Sku )
(% off)
  • Select an item for delivery date
    via standard shipping  
    Special Order: Enter a zip for delivery date
    Estimated to ship - details
    Enter a zip for delivery date
    Estimated to ship - details 
    Special Order - Delivery: ,  
    Estimated, via standard shipping  
  • $ extra handling fee
  • 30-day Guarantee & Easy Returns
  • Available within the U.S. only
  • CS: Ships from
  • CS: on hand


The Cadillac of the Smartwool PhD Outdoor lineup, the Smartwool PhD Outdoor Heavy Crew Socks are fully cushioned, crew-height and designed with the 4 Degree Elite Fit System for a high performance fit that won't slip or bunch inside your boots. These cushy pillows will feel like heaven when you pull a fresh pair out of your pack on a multi-day backpacking trip. Mesh zones help regulate moisture and temperature and merino wool is soft and stink-resistant to help you stay on good terms with your tent mate.


  • Fabric: 86% merino wool, 12% nylon, 2% elastane
  • 4 Degree Elite Fit System uses two elastics for greater stretch and recovery to keep the sock in place; ankle band, upper instep band, lower instep band, arch band
  • ReliaWool Technology in high impact areas provides longer lasting protection; more durable than normal wool
  • Strategic mesh zones for maximum ventilation
  • Flat knit durable toe seam
  • 1x1 ribbed welt
  • 8.5-inches overall height
  • Height: Crew
  • Cushioning: Heavy Full Cushion

Find More

Review Summary

5 out of 5

2 Reviews

  • Build quality: 2
  • Great design: 2
  • Performance: 2

  • Cost: 1
  • Wears quickly: 1
Comfort: 5 / 5
Quality: 5 / 5
Durability: 3 / 5

2 Ratings & Reviews

Comfort: 5 / 5
Quality: 5 / 5
from NJ
25-34 yrs

Most comfortable socks
January 02, 2013

These are the most comfortable socks I ever wore. I wear them primarily with work boots and they provide the comfort, sweat-wicking ability and support I desired in a pair of boot socks. When washing and drying these socks, I highly recommend following Smartwool's care advice: turn the socks inside out. Otherwise the socks will pill. I cannot comment on the durability of the product since I have owned the product for less than a month. So far it seems like the socks will hold up well over time though.

Pros: Great design, Build quality, Performance, Cons: Cost
Comfort: 5 / 5
Durability: 3 / 5
Quality: 5 / 5
from phila, pa
Over 65 yrs

excellent product
January 24, 2013

I have several thichnesses of these PHD outdoor socks. They are all excellent. They fit well and hold their shape, so they can be worn for several days of hiking or travel packing is easier. I would recommend to anyone wanting precise fit, comfort, and great hold of shape

Pros: Great design, Build quality, Performance, Cons: Wears quickly

Also Available

Smartwool PhD Outdoor Heavy Crew Socks Photo

Black and Chestnut.

Available sizes, while supplies last, include size small, size medium, size large and size extra large: s, m, l, xl.

Others Liked:

You've Viewed:

  • Talk to Us:
    (800) 369-3949
    Live Chat
  • We're Available:
    Mon-Fri: 7:30am-4:00pm PST
    Sat-Sun: CLOSED