SmartWool Phd Seamless Double Strappy Sports Bra - Women's

The Smartwool Women's PhD Seamless Double Strappy Sports Bra delivers unparallelled comfort and performance whether you're hiking, running, or riding. The stretchy outer fabric allows unrestricted movement and wicks sweat, and the Merino wool blend lining regulates temperature and provides soft comfort. Smartwool's 4 Degree elite fit system provides enough support for any of your favorite activities, making this your new go-to bra.

  • Moisture-wicking stretch outer shell
  • Merino wool blend lining
  • Four Degree elite fit system
  • Engineered knit cups
  • Covered elastic band at ribcage
  • Reviews
  • Q & A

Basic and Functional

  • Familiarity: I gave it as a gift but have feedback to share
  • Fit: True to size

My girlfriend is on a never ending quest to find the right mix between minimal fabric and support. She claims this sports bra offers a supportive fit while keeping any fabric rubbing or discomfort to a minimum.

First wool bra - happy so far!

  • Familiarity: I've used it once or twice and have initial impressions
  • Fit: True to size
  • Size Bought: Medium

My friend recently revealed to me her winter exercising secret: wool sports bras. This of course led me to seek out one to try for myself.

So far, I've found this one to be both cute and functional. You do lose a little support with the thinner straps, but I haven't found that to be a deterrent to using it while running (I normally wear a 34C for reference). The seamless design is very comfortable, and I love the added benefit of having a bra made of natural fibers (i.e. that doesn't get as stinky as synthetic materials).

All in all, I foresee this bra becoming a staple to my exercise routine, whether it's winter or summer.

First Impression

  • Familiarity: I've used it once or twice and have initial impressions
  • Fit: True to size
  • Size Bought: L

I would normally buy an XL, but I bought the L because I wanted the black, and it was only available in L (and I can sometimes fit a L sports bra depending on it's stretch factor).

This bra has a nice seamless construction, very comfortable. The size L fits as a more supportive option, and due to the seamless construction is still comfortable, even though it's technically a touch small (normal bra size for me is 38C for comparison). So I'll keep the L and probably pick up an XL in a different color now that I know how comfy it is.

For comparison, I will add that the Double Strappy here has slightly less coverage overall vs the PHD Racer Back, and the PHD Strappy. And the upside over the Strappy is the lack of plastic in the straps.

Perfect for hiking

Perfect for hiking

Super cute, a little less supportive.

  • Familiarity: I've used it several times
  • Fit: Runs large
  • Size Bought: Medium

I normally purchase traditional racer-back sports bras with thicker straps but wanted to try out a strappy style since there are so many adorable ones on the market right now. This bra is extremely comfortable, but with the thinner straps you do sacrifice some support.



I'm not too busty, normally wearing a 34C. I ordered this bra in a medium which is what I usually wear and it is a little larger than I would like, the small likely would have provided more support for this style. I would recommend sizing down in this style so you are still getting the full support from the bra.



I've worn it hiking and it certainly did the job, though I would hesitate to run or do any sort of extreme workout in it. This piece is great for low impact activity, lounging, or wearing as a fun detail piece with low-back shirts.



I've washed and dried it multiple times and it has kept its shape and color perfectly.

Super cute, a little less supportive.