Built for changing conditions.
Shop HikingI have several of these
"I have several of these tops and they are very comfortable. I have worn them for several years now. I reccommend these for travel"
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Setting the standard for all others to follow, the Merino 200 Oasis Long Sleeve Crew is a comfortable base layer top that make the perfect foundation for year-round layering.
Good for:


100% Merino Wool, Exclusive Of Decoration
Machine Wash Cold, Gentle Cycle. Wash With Like Colors. Do Not Use Softener. Do Not Bleach. Do Not Tumble Dry. Line Dry In Shade. Cool Iron. Do Not Dry Clean.
Key product measurements
Height: 63.8cm (Based on size S); Width:44cm (bottom opening width, size S)
Fit
Slim
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Merino wool neutralizes unpleasant odors by absorbing odour molecules into its fibers, making them less detectable by the human nose.
Merino fibers efficiently manage moisture, absorbing it from your skin and releasing it into the atmosphere. It can absorb up to 35% of its weight in water without feeling wet.
icebreaker merino wool garments undergo special anti-shrinkage treatment, helping to resist deformation and pilling.
The thermo-regulation properties of merino wool adapt to your body and external conditions, so you can stay warm in the cold and cool in the heat.
Overall rating: 4.8257575 / 5 from 660 reviews.
This thermal top is highly praised for its excellent base layer, great fabric quality, and perfect fit. Customers also appreciate its comfortable feel, appropriate weight, and appealing color. However, some feedback on the sleeves is mixed.
Review topics: ["fit","size","weight","problem","quality","feel","looks","service","material","top","wear","colour","layer","fabric","sleeves","base layer","comfort","warmth","shape","shirt","design","weather","neck","buy","movement","winter","style","icebreaker","stretch","medium"].
"I have several of these tops and they are very comfortable. I have worn them for several years now. I reccommend these for travel"
— Barb (5/5)
"The most useful, comfortable piece of clothing I own-it would be the piece I take to a desert island with me- oasis 200 crewe. Wear on its own-under a jacket-dressy or casual. Base layer for skiing-perfect! Had one for at least 10 years, and looks like the day I bought it, no pilling, machine washes like a dream. 135 lb, 36D, (39” ) large fits well Berry colour-nice addition to my collection."
— Susannah M. (5/5)
"Je les ai découverts pour le ski, mais tellement confortables et chaud sque je les utilise non seulement pour la randonnée, mais aussi au quotidien."
— Francine (5/5)
"Appreciate a lighter color option."
— Lori N. (5/5)
"Perfect base layer! Great fit!"
— Lori N. (5/5)
"Great underlayer for business clothes, the actual color fits my skin tone and doesn't show under white shirts. The "Pink Quartz" of the photo doesn't match the actual color at all, the actual color is not beige but light pink. The Sweetheart Tee has a realistic depiction of the shade."
— C. (5/5)
"This is my second 200 Oasis top and I will get a few more once new colours come out. The temperature regulation is better than any other tops I own. It's so comfortable and universal it's hard not to wear - especially during the 3 colder seasons."
— Robbie (5/5)
"Sizing was good/accurate. Great color!"
— Lisa (5/5)
"Great for running on a cold winter morning."
— Julia (5/5)
"The weight and fit are great. I bought a small instead of an xs this time as I wanted to wear it more like a shirt, so not skin tight ( 5' 100 lbs). BUT, the Natural color of the actual shirt is much yellower than in the photo. I know it's natural undyed wool, but the photo made it look more like off-white and it really isn't. Just so you know."
— Patricia E. (4/5)
Find the size that fits you best based on people just like you.
Use the chart below to determine your size. If you’re between two sizes, order the smaller size for a tighter fit or the larger size for a looser fit. If your measurements for chest and waist correspond to two different sizes, order the size indicated by your chest measurement for tops and your hip measurement for pants.
| XS | S | M | L | XL | |
|---|---|---|---|---|---|
| Bust | 30-32 | 32-34 | 34-37 | 37-40 | 40-42 |
| Arm length | 30.25-30.5 | 30.5-30.75 | 30.75-31 | 31-31.25 | 31.25-31.5 |
| Waist | 24-26 | 26-28 | 28-30 | 30-32 | 32-35 |
| Hips | 34-36 | 36-38 | 38-40 | 40-42 | 42-44 |
| XS | S | M | L | XL | |
|---|---|---|---|---|---|
| Bust | 76-82 | 82-88 | 88-94 | 94-100 | 100-107 |
| Arm length | 77-77.5 | 77.5-78 | 78-78.5 | 78.5-79 | 79-79.5 |
| Waist | 58-64 | 64-70 | 70-76 | 76-82 | 82-89 |
| Hips | 84-90 | 90-96 | 96-102 | 102-107 | 107-113 |
Our three different fits - slim, regular, and relaxed - ensure that when worn together, layers move and breathe like a single garment.

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