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Smartwool - PhD Seamless Racerback Bra - Women's

Smartwool PhD Seamless Racerback Bra - Women's

Temporarily Out Of Stock

Don't get too bummed. This item is on the way and will be available for purchase as soon as it rolls into the warehouse.

Can't wait? Consider one of the other Sports Bras we have in stock.

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Tech Specs

[face] 38% nylon, 30% merino wool, 20% polyester, 12% elastane, [lining] 68% merino wool, 21% nylon, 11% elastane
Recommended Use:
backpacking, casual, hiking, road running, sport climbing, trad climbing, trail running, training, yoga
Manufacturer Warranty:
2 years

PhD Seamless Racerback Bra

Bras can already be a nuisance enough, but with the soft and smooth Smartwool Women's PhD Seamless Racerback Bra, you can go all-out in comfort and support no matter what your day holds. The seamless construction paired with merino wool fabrication manages moisture and stretches for unimpeded movement. Engineered cups were knit to provide next-to-skin coverage and support so you can run, hike, jump, and climb without feeling bogged down by your duo. The rib-knit side panels add extra support with the sleek and feminine racerback finish so you can look your best and feel your best on the go.

  • A soft racerback bra for extra comfort for an active days
  • Merino wool manages moisture and provides a soft fit
  • Seamless lining adds next-to-skin comfort and support
  • Raceback design supports bust with secure fit

Soft and Warm

  • Familiarity: I've used it several times
  • Fit: True to size
  • Size Bought: Medium

Got this for snowboarding. warm soft and comfy. Doesn’t feel like it would be super supportive however I never once noticed it wasn’t or even thought about my bra while going hard in the woods on a powder day. I prob won’t run in it though . I have a wide rib cage but smaller chest. 36-38B. Medium fits perfect.

Slowly converting all my bras to merino

  • Familiarity: I've put it through the wringer
  • Fit: True to size
  • Size Bought: XL

Slowly converting all my sports bras to merino, and this is one of my absolute favorites. I have 3 now.

This one wins for overall comfort in a classic style. I swear they are also figuring out how to make them even softer and more comfortable every year.

XL for a 38C is perfect.


  • Familiarity: I've used it several times
  • Fit: True to size
  • Size Bought: XL

Weekend and Gym day comfort to the maximum.
The fit is True to Size for me and love the support it gives

Comfy but runs small

  • Familiarity: I've used it once or twice and have initial impressions
  • Fit: Runs small
  • Size Bought: XS

I'm obsessed with wool sports bras. They are really a game changer. Not only is this bra super comfortable and soft, it's anti-odor and dries quickly. I use to run in and any other mountain sport. It does run small though. I usually wear an XS in sport bras, but this XS was toooo tight. A small fits nicely.

Fit & Features

    Learn more about the fit, features, and benefits of Smartwool PhD Women's Seamless Underwear. #gofarfeelgood