Risk-Free Shopping—Free 2-Day Shipping on Orders Over $50* Risk-Free Shopping—Free Returns on Orders Over $50* Risk-Free Shopping—Price Match Guarantee

Detail Images

  • Icebreaker - Side
  • Icebreaker - Back
  • Icebreaker - Front
  • Icebreaker - Fabric Detail
  • Icebreaker - On-Model Back
  • Icebreaker - Back
  • Icebreaker - Back
  • Icebreaker - Front
  • Icebreaker - Front
  • Icebreaker - Siren Bikini Underwear - Women's - Black/Black
  • Icebreaker - Siren Bikini Underwear - Women's - Blizzard Heather/Lunar/Blizzard Heather
  • Icebreaker - Siren Bikini Underwear - Women's - Cactus/Jet Heather/Stripe
  • Icebreaker - Siren Bikini Underwear - Women's - Fawn Heather/Fawn Heather/Fawn Heather
  • Icebreaker - Side -
  • Icebreaker - Back -
  • Icebreaker - Front -
  • Icebreaker - Fabric Detail -
  • Icebreaker - On-Model Back -
  • Icebreaker - Back -
  • Icebreaker - Back -
  • Icebreaker - Front -
  • Icebreaker - Front -

Current Color

  • Icebreaker - Siren Bikini Underwear - Women's - Black/Black
  • Icebreaker - Siren Bikini Underwear - Women's - Blizzard Heather/Lunar/Blizzard Heather
  • Icebreaker - Siren Bikini Underwear - Women's - Cactus/Jet Heather/Stripe
  • Icebreaker - Siren Bikini Underwear - Women's - Fawn Heather/Fawn Heather/Fawn Heather

Icebreaker Siren Bikini Underwear - Women's

$30.00

Free 2-Day shipping on orders over $50*

Select a Size:

Select options
  • Select options
    • XS
    • S
    • M
    • L
    • XL

    Select a Color:

    Select options
  • Select options
    • Black/Black
    • Blizzard Heather/Lunar/Blizzard Heather
    • Cactus/Jet Heather/Stripe
    • Fawn Heather/Fawn Heather/Fawn Heather
    556

    6 Reviews

    Details

    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. 

    • 83% merino wool, 12% nylon, 5% Lycra
    • Naturally antimicrobial
    • Low rise with full coverage
    • Item #ICE00HO

    Tech Specs

    Material
    83% merino wool, 12% nylon, 5% Lycra
    Cut
    hipster bikini
    Anti-Odor
    yes, natural attribute of merino wool
    Recommended Use
    casual, hiking, running, skiing
    Manufacturer Warranty
    1 year

    Tech Specs

    • Reviews
    • Q & A

    What do you think about this product?

    Have questions about this product?

    Great underware

    • Familiarity: I've used it several times
    • Fit: True to size
    • Size Bought: xl

    I got these for backpacking and they are great. I will be wearing them all the time. They dried quickly when washed and when being worn. They didn't stink either which was amazing.

    Super comfy

    • Familiarity: I've used it several times
    • Fit: True to size
    • Size Bought: Medium

    I've used these on a couple of weekend backpacking trips so far and they've been great! Very lightweight, comfortable and they don't ride up like typical bikini underwear do (for me anyway). I'm average weight and carry my weight in my hips and legs so the medium fit perfectly.

    Comfortable, quick-drying

    • Familiarity: I've put it through the wringer
    • Fit: True to size
    • Size Bought: Large

    I bought a pair of these for my Appalachian Trail Thru-Hike. They lasted the whole way - over 2,000 miles of walking in them over 6.5 months.

    They are extremely comfortable and always stay in place, even while walking long distances with a heavy backpack on. They are definitely odor-resistant, and one of my favorite features of these (and most merino) is the quick-drying. I was able to wash these in the morning, and a few hours later (or less), they'd be dry.

    After my thru-hike, I loved them so much, I bought 2 more pairs. The only reason I am giving these 4 instead of 5 stars is because these second 2 pairs have not been durable. One pair is burning a hole in the crotch, and the other pair ripped at the top seam.

    Lightweight and built to stay in place!

    • Familiarity: I've used it several times
    • Fit: True to size
    • Size Bought: Small

    These underwear are very comfortable to wear. The material is soft and comfortable for a variety of activities. I have been wearing them when I hit the slopes and even then, they will stay in place. They don't have the "granny panty" look or feel, so I'm a huge fan! I got these in a size Small, I'm about 130 lbs with an athletic frame and they fit great!

    Love!!

    • Familiarity: I've used it several times
    • Fit: True to size
    • Size Bought: Medium

    Super nice! Seriously feels like you are wearing nothing, these are the perfect fit and they stay in place. A great underwear for multiple activities as well- sometimes bikini cut can feel like diapers but not these, very flattering and functional. Enjoy.

    Magic Merino!

    • Familiarity: I've put it through the wringer
    • Fit: True to size
    • Size Bought: Medium

    I have been an Icebreaker fan for years, but was never brave enough to try their underwear until recently and I shouldn’t have waited this long! These underwear might not look like much in the picture but the merino blend makes them SO comfortable and light weight! Plus the updated bikini cut is flattering on my back side while still providing enough coverage. I am definitely a believer in the magic of merino underwear and will be getting these in every color. Worth every penny!