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Icebreaker
Siren SS Sweetheart Top - Women's

4.8 out of 5 stars
10 Reviews

Out of Stock

Don't worry though, we have a lot more Women's Baselayer Tops in stock than that.

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Siren SS Sweetheart Top



Details

  • A soft and stretchy tee that’s essential in every closet
  • Merino wool blend wicks perspiration, fights odor, and is soft
  • Synthetic fibers back wool for added strength and stretch
  • Scooped V-neck line is flattering and comfortable
  • Item #ICE00HL
Responsible Collection
Responsibly Sourced
Material
83% Merino, 12% nylon, 5% Lycra
Insulation Weight
lightweight
Fit
slim
Style
v-neck
Recommended Use
casual, hiking, camping
Manufacturer Warranty
1 year

What do you think about this product?

Overall Rating

5 based on 10 ratings

Review Summary

1 Stars - 0 reviews
2 Stars - 0 reviews
3 Stars - 0 reviews
4 Stars - 2 reviews
5 Stars - 8 reviews

Fits Small

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5 out of 5 stars

April 11, 2025

Not my first or last siren.

[This review was collected as part of a promotion.] I have several Siren tshirts. I bought this one because, horrors, I lost my last one on a trip! Cannot be without a black merino tshirt ever!!!!! Perfect year round in the Pacific Northwest.

253Girl
icebreaker.com

Originally reviewed on icebreaker.com

5 out of 5 stars

March 1, 2025

This is my go-to undershirt and helps me thermoregulate

[This review was collected as part of a promotion.] I love icebreaker and wool in general. I own several icebreaker t's and these have the nicest fit, very flattering without being too tight. They are perfect under a sweater and also with a blazer.

worldexplorergirl
icebreaker.com

Originally reviewed on icebreaker.com

5 out of 5 stars

February 13, 2025

I love this and want another now!

[This review was collected as part of a promotion.] I bought this specifically to layer underneath sweaters during the winter. Now, I'm realizing that I can use it during all seasons because it's so light and breathable. It's a snug fit, but that's exactly what I wanted so that it's not too baggy. I'm looking into buying another!

Edie
icebreaker.com

Originally reviewed on icebreaker.com

5 out of 5 stars

December 5, 2024

Perfect for sweater undershirt

I was searching for a slim fitting wide, neck undershirt to wear under my sweaters for this winter. I get smelly pits no matter what I do and having to wash a thick sweater after wearing it for only a few hours when it really isn't dirty, except for my armpits was frustrating. I came across this shirt, and based on the reviews, decided to order a small and a medium to see which one would be the best next to skin fit. Happily the small fits perfectly. It is very thin and very lightweight. I wouldn't wear it on its own as a T-shirt but for my purpose of wearing underneath sweaters for the winter it's perfect. For reference I am 5'5" 145lb with a slim athletic build. The reviews were so mixed on whether or not it was too tight or too loose from people with similar measurements that I decided and take advantage of icebreakers free returns to send back whichever had a looser fit, which was the medium.

Pnwgurl
icebreaker.com

Originally reviewed on icebreaker.com

5 out of 5 stars

December 3, 2024

Every day, under everything, all winter long

[This review was collected as part of a promotion.] Perfect for wearing every day, under everything, all winter long. Got the matching short sleeve, long sleeve, and leggings all in medium.

Meg
icebreaker.com

Originally reviewed on icebreaker.com

5 out of 5 stars

September 14, 2024

Love these T's

I have about 5 of this t-shirts in multiple colors. I used them on a 3 month bike trip in SE Asia, hiking in Nepal, running and at the gym. They are soft, light weight, dry quick and never smell. I got ride of my polypro shirts that would stink so bad, I couldn't stand it. I now only wear wool. These are my favorite t-shirts and wear them almost every day for sports and/or with a skort going out for the day or to dinner. Perfect for many occasions. Recommend them all the time.

LM
icebreaker.com

Originally reviewed on icebreaker.com

4 out of 5 stars

June 7, 2024

Great color. A bit snug

[This review was collected as part of a promotion.] Great color. Its my sleep shirt in warmer months. For XL, I wish it was a bit larger. Normally I wear L and wanted a loser fit but it still clings to me.

Meg
icebreaker.com

Originally reviewed on icebreaker.com

5 out of 5 stars

June 2, 2024

This is a repeat buy for me

[This review was collected as part of a promotion.] I love these t-shirts for all my active sports. No matter how much I sweat, these shirts never smell. I've switched over all my polypropylene to wool. These are light weight and super comfortable. Great for layering too. I also use the long sleeve version for another layer. I'm always cold on airplanes and can regulate my temp based on my layers. Love love love these t's.

Linda
icebreaker.com

Originally reviewed on icebreaker.com

5 out of 5 stars

March 29, 2024

I have several in different colors.

[This review was collected as part of a promotion.] I'm 4'11" and 92 lbs. The x-small for perfect. I can also wear a tanktop underneath if needed. Very comfortable and lightweight. Very flattering too.

Mar
icebreaker.com

Originally reviewed on icebreaker.com

4 out of 5 stars

December 6, 2021

Definitely small, slightly scratchy

Familiarity:
I've used it once or twice and have initial impressions
Size Bought:
XS
Height:
5' 3"
Weight:
110

First off, let me say: I am keeping this and I think it will work for multiple things. That said, it is definitely much tighter than other Icebreaker XS Ts - and IMO it is definitely scratchier. Not a dealbreaker but not as soft as their other items. I still think it will be a great layer when you need something really thin underneath other stuff, or even just want a little oomph on a normal day out on the town. I'm obsessed with Icebreaker and can't stop adding to my collection. It's basically all I want to wear these days!!

Emilie R