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.
Shop similar products- 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 BriefsBest Use | Multisport Casual |
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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 |
2X | 3X | XS | S | M | L | XL | |
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Numerical Size | 0-2 | 4-6 | 8-10 | 12-14 | 16-18 | ||
Bust | 42 - 46 | 46 - 49.5 | 30 - 32.25 | 32.5 - 34.5 | 34.5 - 37 | 37 - 39.5 | 39.5 - 42 |
Waist | 36 - 40 | 40 - 44 | 24 - 26 | 26 - 28 | 28 - 30.5 | 30.5 - 33 | 33 - 36 |
Hip | 45 - 48.5 | 48.5 - 52 | 33 - 35.5 | 35.5 - 38 | 38 - 40 | 40 - 42.5 | 42.5 - 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.
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Most Helpful Critical Review
Best thong ever
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...
My new favorite lingerie
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!
Gusset too far back
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.
Didn't last
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.
Good
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.
Well worth the cost!
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.
wedgie free!
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.
Great for sweaty activities
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.
best thong ever
So comfy and great quality. Wish I could buy more but they haven’t restocked my size (medium) in many months.
Best travel/active undies out there!
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.