Smartwool Merino Women’s 150 Bikini Briefs

Crafted from world-renowned Merino blend jersey fabric, the Smartwool Merino 150 bikini briefs are soft, durable, and versatile.

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Modest yet sexy; soft yet durable. lightweight yet supportive. The Smartwool Merino 150 Bikini Briefs are an ultra-versatile pair of underwear for any occasion. You can wear them at the gym, at the office, or even out in nature!

It’s hard to put into words how comfortable these underwear feel. The fabric itself almost has a silky texture, which minimizing irritation. Meanwhile, Smartwool uses flatlock seams so that the stitching itself does not cause discomfort. The 150 Bikini Briefs are designed precisely with your satisfaction in mind.

However, the added comfort and luxury comes with a bit of a price. The 150 Bikini Briefs sits on the expensive end of the Merino underwear spectrum. On the other hand, we feel like the price is justified due to their incredible qualities.

To sum up, these Smartwool bikini briefs may look basic from the outside. But they genuinely are a great pair of Merino wool underwear.

View Smartwool Sizing Charts & Company Profile

Smartwool Merino 150 Bikini Briefs

Specs & Features:

  • 87%/13% Merino wool blend with corespun nylon for better strength
  • Ultralight 150 GSM fabric weight
  • Slim-to-small fit
  • Mid-rise waist
  • Flatlock seams reduce irritation
  • Weight= 0.7 oz (size: medium)
  • 2 colors available (black & gray)


  • Excellent Merino wool quality and improved design maximizes comfort
  • Offers sufficient temperature regulation through ultralight, jersey-knit fabric
  • Versatile cut & style that pairs well with most outfits.


  • The sizing runs a bit small. Make sure to check out Smartwool’s sizing charts before purchasing.
  • Some users have reported waistband durability issues, but we have not had this experience.

Best For:

Adventure | Casual | Lifestyle | Training | Travel

Featured In:

Best Merino Wool Underwear For Women

Disclaimer: To maintain genuineness and authenticity, Merino Wool Gear DOES NOT sponsor products. However, as an Amazon Associates member, we may earn a commission from qualifying purchases.

Additional information

Merino Percentage

80-94% Merino Wool

Fabric Density (gsm)

145 – 180 Ultralight


Casual, Lifestyle, Adventure, Training, Travel

Colors Available

Black, Light Gray


Form-Fitting / Athletic