Icebreaker
Siren Bikini Underwear - Women's

4.17948717948718 out of 5 stars

39 Reviews

Out of Stock

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Details

83% merino wool, 12% nylon, 5% Lycra
Naturally anti-odor
Low rise with full coverage
Item #ICE00HO

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Tech Specs

Why We Like The Siren Bikini Underwear

Quick—ring the alarm! Someone notify the comfort police that the Icebreaker Women's Siren Bikini Underwear is the new sheriff in town. Crafted with an ultralight merino wool combined with a touch of Lycra, these full coverage bikini undies put a practical and comfortable spin on your run-of-the-mill bikini silhouette with their low rise and full coverage. Additionally, merino wool naturally kicks unsavory odors out the door so you won't feel quite as stinky after having run 15 miles through the local trail system.

Details

83% merino wool, 12% nylon, 5% Lycra
Naturally anti-odor
Low rise with full coverage
Item #ICE00HO

Responsible Collection: Responsibly Sourced
Material: 83% merino wool, 12% nylon, 5% Lycra
Cut: hipster bikini
Anti-Odor: natural attribute of merino wool
Manufacturer Warranty: 1 year

Reviews

Q&A

Overall Rating

4 based on 39 ratings

Review Summary

1 Stars - 4 reviews

2 Stars - 2 reviews

3 Stars - 4 reviews

4 Stars - 2 reviews

5 Stars - 27 reviews

Fits True To Size

Screen reader users: the following list provides a visual scale to illustrate the product fit. Please refer to the heading above for the fit type in text.

Runs smallTrue to sizeRuns large

Customer Images

Here's what customers have to say

The reviews indicate the underwear is generally well-received. Customers praise it for being comfortable, breathable, and odor-resistant, making it suitable for everyday wear and activities. Key positives include soft, lightweight fabric, excellent breathability and moisture-wicking, odor-resistance, quick-drying, and flattering design. Some noted the coverage is a bit skimpy and the sizing runs small, while a few found the tags irritating. Overall, the majority of reviewers are highly satisfied and recommend the product.

AI-generated from the text of customer reviews.

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1 out of 5 stars

June 18, 2025

Sizes have gotten smaller

[This review was collected as part of a promotion.] I've bought the same underwear in the past same size and this time around it appears the measurements have at least an inch missing in fabric/waistband compared to my other size small.

Steph

Originally reviewed on icebreaker.com

5 out of 5 stars

June 17, 2025

Fantastic

[This review was collected as part of a promotion.] If you're on the fence about these, go for it. They're so light and comfy, and very flattering. They are a little low cut, so if you're between sizes I'd size up. These are so much better than the competition I've tried, it's not even a contest.

Alex

Originally reviewed on icebreaker.com

5 out of 5 stars

June 15, 2025

A lifelong customer

[This review was collected as part of a promotion.] Ice breaker underwear are by far my favorite. They are soft and breathable. They meet the needs of an active lifestyle. They aren't necessarily as durable as cotton but I feel good about the material sourcing.

Alex

Originally reviewed on icebreaker.com

5 out of 5 stars

June 14, 2025

Great product

[This review was collected as part of a promotion.] Fits well, very comfortable. Looks good and very functional. Really great for backpacking, hiking and outdoor activities. I would buy this again.

backpacking gal

Originally reviewed on icebreaker.com

5 out of 5 stars

June 14, 2025

These are the best undies

[This review was collected as part of a promotion.] These are my favorite underwear. I have several pairs in different colors and I love them.

Originally reviewed on icebreaker.com

5 out of 5 stars

May 14, 2025

my favorite!

These have held up SO WELL! From handwashing on a through hike to wearing daily for my job. I will be buying many more. Thank you icebreaker for making quality products that work!

Leah J