Icebreaker  Siren Thong Underwear - Women's

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Cozy, breathable and soft, the Icebreaker Siren thong underwear offer moisture-wicking, itch-free merino wool fabric in a modern fit.

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Features

  • Core-spun fabric features soft merino wool fibers wrapped around a nylon core for added strength and durability, while retaining next-to-skin softness
  • Side seams are slightly frontward to lend simple, chafe-free comfort during both active and casual wear
  • Lightweight, breathable fabric resists odors naturally
  • Fabric blend also wicks moisture and dries quickly
  • Icebreaker will replace your garment within 1 year of purchase if it has been damaged by faulty fabric, stitching or manufacturing; see Icebreaker website for details

Imported.

View all Icebreaker Women's Briefs

Technical Specs

Best Use

Multisport

Casual

Underwear Style

Thong

Fabric

83% merino wool/12% nylon/5% Lycra spandex

Moisture Wicking

Yes

Quick Drying

Yes

Gender

Women's

Sustainability

Contains ZQ merino wool

Size Chart

Icebreaker Clothing - Women's
2X3XXSSMLXL
Numerical Size0-24-68-1012-1416-18
Bust42 - 4646 - 49.530 - 32.2532.5 - 34.5 34.5 - 3737 - 39.539.5 - 42
Waist36 - 4040 - 4424 - 2626 - 2828 - 30.530.5 - 3333 - 36
Hip45 - 48.548.5 - 5233 - 35.535.5 - 3838 - 4040 - 42.542.5 - 45

Sizing Notes

Measurements are stated in inches unless otherwise indicated.



CHOOSING THE RIGHT SIZE: If your body measurements are midway between two sizes, select the smaller size for a tighter fit or the larger size for a looser fit. If your body measurements result in different sizes, we recommend using your chest measurement for tops and your hip measurement for pants.

Reviews
57 reviews with an average rating of 4.6 out of 5 stars

Ratings Snapshot

Product Rating

47 out of 52 (90%) reviewers recommend this product

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Average Customer Ratings

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Most Helpful Favorable Review

5 reviews with an average rating of 5.0 out of 5 stars
My new favorite lingerie
Singingpalmtree
2 years ago
Received free product
I have never spent this much on a pair of underwear but WOW was every penny worth it! I won't wear anything else now while doing snow sports. Great gift or stocking stuffer!
Singingpalmtree
Vancouver, WA
4 people found this review helpful

Most Helpful Critical Review

5 reviews with an average rating of 3.0 out of 5 stars
Gusset too far back
emro206
2 years ago
Received free product
Nice, comfortable underwear except that the gusset placement is too far back. I hate it when that happens and it prevents me from enjoying the underwear.
emro206
Seattle
3 people found this review helpful
MelPDX
Portland, OR
Rated 5.0 out of 5 stars

Best thong ever

4 years ago

I typically don’t wear thongs because most of them just make it feel like you’ve got a permanent wedgie (uncomfortable and annoying). During the last REI sale, I figured I’d give this thong a try since Icebreaker always seems to know how to nail a product. They’ve done it again! Somehow they created a comfortable thong, no wedgie feeling at all, and I almost forget I’m even wearing it. I love that it’s mostly made of wool so it’s breathable, antimicrobial, etc. When these go on sale again I’ll definitely be stocking up... My hat is off to you, Icebreaker! A comfortable thong is no small feat...

Height:5'8"
Age:35–44
Weight:225–250 lbs.
Yes , I recommend this product

Overall Fit Rating

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Singingpalmtree
Vancouver, WA
Rated 5.0 out of 5 stars

My new favorite lingerie

2 years ago

I have never spent this much on a pair of underwear but WOW was every penny worth it! I won't wear anything else now while doing snow sports. Great gift or stocking stuffer!

Age:25–34
Yes , I recommend this product

Overall Fit Rating

Runs SmallRuns Large
Helpful?
emro206
Seattle
Rated 3.0 out of 5 stars

Gusset too far back

2 years ago

Nice, comfortable underwear except that the gusset placement is too far back. I hate it when that happens and it prevents me from enjoying the underwear.

Age:25–34
No, I do not recommend this product

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emc12
Rated 1.0 out of 5 stars

Didn't last

4 years ago

I just purchased these in mid-July and loved them. I actually ordered several more pairs - they are comfortable and sweat wicking for a hot humid climate. Unfortunately, I just discovered a hole in one of these. For $30 underwear this is unacceptable quality.

Height:5'9"
No, I do not recommend this product

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Alex
Rated 5.0 out of 5 stars

Good

2 years ago

I was hoping for the world’s most comfortable thong at this price. It’s comfortable, but not more than my $4 cotton pair from Amazon. They are quick drying and retain shape well after washing, so these are definitely worth the $ if you’re camping/hiking.

Age:35–44
Weight:150–175 lbs.
Height:5'8"
Yes , I recommend this product

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Cassandra G
LaCrosse, Wi
Rated 5.0 out of 5 stars

Well worth the cost!

3 years ago

These undies are everyday and backpacking friendly. They're true to size and they're well sown. I would highly recommend these to anyone looking for the "perfect thong". I bought three and then bought four more.

Age:25–34
Weight:150–175 lbs.
Height:5'7"
Yes , I recommend this product

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TheChubbbyHiker
Oklahoma
Rated 5.0 out of 5 stars

wedgie free!

6 months ago

Got these on close out and thought I would take a gamble. I mean what could go wrong with wool and a thong🤣 These are such a hit! No itch, no wedgie, just comfort. Icebreaker knows how to hit home runs.

Age:25–34
Yes , I recommend this product

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kmenoche
Phoenix
Rated 5.0 out of 5 stars

Great for sweaty activities

3 years ago

I didn’t expect these to turn into my new favorite underwear, but they did! Any time I know I will be sweaty for a long time, these are my go-to. They keep me dry and comfortable.

Age:25–34
Weight:150–175 lbs.
Height:5'2"
Yes , I recommend this product

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Grace
Michigan
Rated 5.0 out of 5 stars

best thong ever

9 months ago

So comfy and great quality. Wish I could buy more but they haven’t restocked my size (medium) in many months.

Age:25–34
Weight:125–150 lbs.
Height:5'9"
Yes , I recommend this product

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Anonymous
Southern Oregon
Rated 5.0 out of 5 stars

Best travel/active undies out there!

5 years ago

These are the best underwear for everything out there. I’ve worn the ex officio and multiple other brands on outdoor backpacking trips and extended traveling backpacking trips including 10 days on the TMB. Nothing compares. They’re comfortable, they breathe, they wash and dry fast, and they don’t stink. I have yet to find anything else that even comes close, and I’ve been addicted to buying new underwear for yearrrrs.

Age:35–44
Weight:100–125 lbs.
Height:5'2"
Yes , I recommend this product

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1 - 10 of 57 Reviews

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