Icebreaker Siren Bra - Women's


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If you’re tired of washing your delicate bras so often, try the Women's Icebreaker Siren Bra and see how quickly you convert to wool forever. This super soft merino wool bra is smooth against your skin for everyday wear. Wool naturally regulates your body temperature and deals with odors so you don’t have to wash it as often as your stinky cotton bras. Fully lined with adjustable straps for a comfortable fit, this will soon become the only bra for you.


  • Fabric: 96% merino wool (150g/sq m), 4% lycra
  • Fully lined with adjustable straps
  • Support: A-B cup, no impact
  • Recommended use: Casual, everyday

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Review Summary

4.8 out of 5

6 Reviews

  • Ease of use: 2
  • Great design: 2
  • Performance: 2
  • extremely comfortable: 1

Comfort: 5 / 5
Durability: 5 / 5
Quality: 5 / 5
Support: 4 / 5
Fit: 2 / 5

6 Ratings & Reviews

Comfort: 5 / 5
Quality: 4 / 5
Support: 4 / 5
FitClothes: 2 / 5
from Vancouver canada
35-44 yrs

September 23, 2013

Wish I had bought more than one. Band is not adjustable, fits small. I am 30B/32A, xs fits well. Enough support for me. Others may want a bra with more support. Contains without flattening too much.

Pros: Great design, Ease of use
Comfort: 5 / 5
Durability: 5 / 5
Quality: 5 / 5
Support: 3 / 5
from Clearwater, FL
25-34 yrs

Super comfy bra
June 26, 2013

This is my first wool bra, and it will not be my last! So soft and comfy! Looking forward to a trip to Colorado with this and my Patagonia Barely Bra. Keeps the girls in place, but obviously doesn't provide a ton of support, but enough for daily activities.

Comfort: 5 / 5
Durability: 5 / 5
Quality: 5 / 5
Support: 3 / 5
from Springfield, MO
25-34 yrs

So Comfortable
August 13, 2012

Love, love, love this bra. It's super comfortable, provides medium support (I'm a 34 B and got the Small, fits perfectly). Great for camping, etc as it doesn't get smelly and dries very quickly.

Pros: Great design, Lasts forever, Performance
Comfort: 5 / 5
Quality: 5 / 5
Support: 5 / 5
from Oregon Coast
35-44 yrs

The Bra I've Been Waiting For
September 10, 2012

I actually bought both this bra and the Ibex Balance Light bra because I couldn't decide. I'm very happy with both and decided to keep them. My reviews for both are basically the same as below. However, the Icebreaker fabric is a bit thicker and the overall design somewhat more minimal. Also the cut is a bit more elegant in my opinion. I would be hard pressed to choose my favorite. I was already a big fan of merino but wasn't sure about underwear. I consider myself very sensitive but this bra is soft and I have no complaints. I've only had it a few weeks so I can't say anything for durability, but it appears well made and merino tends to hold up better than cotton in my experience. It is comfortable and supportive, provides coverage but is also flattering. My bra size is technically a 32D, which can be tricky to fit (or find). I bought it in medium and it's perfect.

Pros: Great design
Comfort: 5 / 5
Quality: 5 / 5
Support: 5 / 5
from Livermore, CA
45-54 yrs

Perfect Fit!
March 22, 2012

I searched for several months for a comfortable, moderate/medium support bra to wear hiking and backpacking. I finally found the perfect bra for my needs. The Icebreaker Siren Bra is comfortable, offers moderate/medium support, lightweight, breathable, and quick-drying. I tried so many other bras/sport bras that just were not comfortable (felt like I was in a straight jacket) and extremely difficult to get on. I am 5'8" and 120 lbs. I wear a size 32B bra. I bought the Siren bra in size small and it fits perfectly. My only concern was with the adjustable straps. I worried that my backpack straps would put pressure on the adjustable part of the bra strap and dig in to my skin. Happily, after several hikes, my concerns were unwarranted. This bra is so comfortable and silky soft that I forgot I had it on. I plan to buy more and only wish I had another color choice.

Pros: Great design, Performance, Ease of use, extremely comfortable
Comfort: 4 / 5
Quality: 5 / 5
Support: 4 / 5

nice and comfotable
April 27, 2013

This is a really nice simple bra. I like the pull- over style because I do not like clips and clasps at the back. The cup size runs slightly small. I first ordered a size small. The band felt good with the small, however the cup size did not fit. I usually wear small or even extra small (as in the old style Patagonia barely bra) or on the smaller side of34B. With the icebreaker siren bra I exchanged for the Medium.

Pros: Ease of use

Also Available

Icebreaker Women's Siren Bra Photo


Available sizes, while supplies last, include size xs, size small, size medium, size large and size extra large: xs, s, m, l, xl.

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