icebreaker Women's Merino Siren Sports Bra

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About This Item

Fit & Design:

  • Low impact support sports bra for minimal workout days
  • Wide open back for freedom of movement
  • Straps adjustable to your perfect fit
  • Pull-on sports bra for easy on and off slip
  • No-side-seam design prevents underarm chafing
  • Space to insert bra cups to secure your fit as you move

Technology:

  • Made with Merino Corespun: Durable Merino fibers regulate body temperature and resist odor to keep you cool when it's hot and warm when it's not

Additional Details:

  • Icebreaker harnesses performance qualities of natural fibers to offer an alternative to petrochemical synthetic-based clothing
  • Machine wash cold, delicate with like colors. Do not bleach or use softeners. Fasten all closures to wash and dry
  • Do not tumble dry. Line dry in shade. Do not iron. Do not dry clean
  • Brand : Icebreaker
  • Country of Origin : Imported
  • Style : IB104708
  • Fabric : 80% Merino wool / 12% nylon / 5% LYCRA®
  • Web ID: 23IBRWWSRNBRXXXXXWOA
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REVIEWS

4.3

81%

Recommended

104 Reviews

Images

Love These

Bought my first one of these merino wool bras at REI years ago for a road trip and instantly fell in love. I’ve since gained a little weight and had to size up—and they’re still amazing. I just bought two more, and honestly, I never want to wear another bra again. These are incredibly breathable, flattering, and supportive—but the real game-changer is how well they handle heat and humidity. Even on muggy summer days or after a long bike ride, I’m not left with underboob sweat or dampness. The moisture-wicking and odor resistance are top-tier. I’ve worn one out riding, and the next day it’s dry, fresh, and totally wearable again. No clamminess, no smell, no stiff seams or heavy fabric. This is hands down my go-to everyday bra—not for workouts, but for everything else. I seriously need to stock up because nothing else compares.

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Verified Purchase

This Bra Has Saved My Summers

[This review was collected as part of a promotion.] I know a lot about wool, so I expected good results from a merino bra but y'all: I did not realize how effective this would be at wicking away boob sweat. I live in a hot and HUMID climate and in the depths of midsummer it feels like someone has set up a sauna between my breasts. I was a little worried about the wool retaining heat but if it does I haven't noticed and if it doesn't, the humidity control more than makes up for it. This is now the only summer bra for me; I pledge my fealty to it and no other.

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Verified Purchase

Work In A Restaurant And It's Great For Wicking Sweat

[This review was collected as part of a promotion.] I bought this bra because I needed a bra to keep me dry while working. The icebreaker bra is great at wicking moisture and staying dry when I am sweaty. It does the trick and I love the cup shape.

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Comfy And Keeps Smells Down!

High quality and very cute fit. Comfortable. Highly recommended! Keeps smells away for long hikes.

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Verified Purchase

Very Comfortable, And It Looks Like It Too

[This review was collected as part of a promotion.] 5'5", 135-140lbs, 34C - This is SO comfortable and it looks like it. Not much support, bulging at lines, too embarrassed to wear this in public. This is for A/B cup gals not C+

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