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Designed to dampen vibrations during training, provide extra muscle support, and improve blood circulation to promote recovery, the SmartWool PhD Running Graduated Compression Ultra Light Sock delivers top-shelf comfort during your workout and beyond.

  • Graduated compression fit helps improve circulation and provides excellent support during your run or for your post-workout recovery
  • Blended composition maximizes the benefits of each separate material while minimizing fabric drawbacks
  • Non-itchy merino wool breathes well, helps regulate body temperature, and is naturally odor resistant
  • Nylon components dry quickly, breathe well, and add extra durability
  • 4Degree Elite Fit system employs ankle, instep, and arch elastic bands for better stretch, fit, support, and circulation
  • ReliaWool tech on the bottom of the sock combines high-density impact zones along the ball and heel provides long-lasting protection
  • 20-30 mmHg graduated compression rating

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Here's what others have to say...

Unanswered Question

What shoe sizes coordinate wit small, medium large, etc? Thanks!

4 5

Don't just buy these, marry them.

  • Familiarity: I've used it once or twice and have initial impressions

These arrived tonight and I tried them on immediately. The only problem is now I don't ever want to take them off. I thought I was doing fine with my calf and ankle issues by wearing sensible shoes and light exercise and calf stretches, but now that I'm wearing these I realize just how uncomfortable my calves, ankles, and arches have been. Everything just feels better simply from wearing these the past few hours. I really wish I'd known about these when I first took up running or during the first of many attempts to recover from tendinitis. These seem like they may actually help me fully recover. I'm only giving four stars though, not five, because I haven't tried them long enough to attest to how well they work over the long-run. But in the short run, they feel awesome.

5 5

They performed great!

  • Gender: Male
  • Familiarity: I've used it several times
  • Fit: True to size

I purchased these while training for the Superior Trail 25k in Northern Minnesota. I have never tried compression anything before but bought these to relieve pain from medial shin splints I incurred while training (it's tough to get enough winter/spring running volume in MN). They allowed me to run completely pain free and I finished the race with no shin splint pain whatsoever.

2 5

Holy socks!

  • Gender: Male
  • Familiarity: I've used it several times

I think Smartwool needs to go back to the drawing board a little on their socks, including this pair. After only ONE WEEK, there was a hole in both toes. This is common with their other socks too. I'm done with this brand.

Responded on

Been abusing Smartwool socks for a numbers of years. I have never had a problem with them and would recommend them to anyone.

Responded on

I've worn these socks for a year now, mostly at work: long days on the feet. These are the best socks I've worn, hands down. Easy to get on as well, which most compression socks are kinda hard to get on.