How to Choose Base Layers

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An active base layer top for year-round layering and everyday comfort, the women's Icebreaker Merino 200 Oasis Long-Sleeve Crewe Cloud Dye is breathable, stretchy and naturally odor-resistant.
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View all Icebreaker Women's Base Layer TopsBest Use | Multisport |
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Shirt Type | T-shirt |
Fabric | 100% wool, exclusive of decoration |
Moisture Wicking | Yes |
Quick Drying | Yes |
Underwear Weight | Midweight |
Sleeve Length | Long Sleeve |
Gender | Women's |
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 |
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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Love love love, I get so many compliments on the pattern and the cut looks great. I got the small (I'm about 5'5 and 135lbs) I got this because it's 100% wool. Lived in it for 4 days over the course of a long distance bike-camping trip (no showers!) and it really held up. Didn't smell at all - which is more than I can say for any poly-blend I ever wore. California in the late fall = cold at night and hot in the day. This shirt kept me cool when the sun was beating down and it was warm even when I was sweating through it at night. Soft, airy, and comfortable. It's the perfect thickness, which makes it the best baselayer I have. For reference, I also have smart wool, KH, and REI coop brand wool base layers. I keep coming back to this one. It's expensive but I am about to order the same one in white.
Lightweight and breathable, super soft and not scratchy, surprisingly stretchy. Love the subtle pattern. Fits true to size. May just have to get this in the other color!
I am 5’6” 150# and muscular/athletic build. I am somewhere between a small and medium most of the time and the small fits perfectly- not tight. Pattern is cute. I wear merino tops year round in the mountains. The breath and regulate temperature really well. They almost never stink, even after multiple days of wearing and sweating in them. So far I’ve worn them to alpine ski, xc and skate ski, ski tour, run and live/lounge in. Love it in every situation.
[This review was collected as part of a promotion.] I love this merino wool Icebreaker top. It fits great. It's easy to wash using a laundry bag with cold water and medium cycle. I wash all of my merino wool items together in the machine using numerous laundry bags since I have underwear, socks, undershirts, short and long sleeve tops, and even long pants. I love them all!
[This review was collected as part of a promotion.] I have already worn this merino layer for multiple days in a row on my Christmas trip where I had to pack minimally and it has held up well (does not smell). It is also soft, and flattering, and I love the dye pattern. Thank you for upping my layering game! Size M fit well I am 5'6" 150 lbs.
[This review was collected as part of a promotion.] I've been wearing icebreaker base layer bottoms for a few years and this is my first foray into the tops. I love the color, fit, warmth, and breath ability.
[This review was collected as part of a promotion.] This shirt is super cozy and keeps me warm without overheating. I love the beautiful dyed fabric. A great baselayer! I am 5'5 115lbs and the xs fit great.
I owe several icebreaker merino base layers before this purchase. I like the new cloud design and it is not scratchy!
[This review was collected as part of a promotion.] This thermal top will be perfect to wear around town or to hike in. It's a beautiful color and quite versatile.
[This review was collected as part of a promotion.] Comfortable, soft, fits great and warm! A good base layer for the Pacific Northwest. I would purchase again.