Merino 200 Oasis Long-Sleeve 1/2-Zip Top - Men's
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Why We Like The Icebreaker Merino 200 Oasis Long-Sleeve 1/2-Zip Top
No matter what we are getting up to this winter, the Icebreaker Merino 200 Oasis Long-Sleeve 1/2-Zip Top has us covered. Featuring a 100% Merino wool construction, the Merino 200 Oasis Long-Sleeve is perfect for wearing as a baselayer for hiking, snow sports, or casual use. The quarter zip allows us to customize our airflow and warmth, while the slim fit ensures it is easy to layer with.
Details
- Warm and lightweight baselayer for cool-to-cold weather
- Merino wool construction is temperature-regulating and moisture-wicking
- Quarter-zip neck with extended collar keeps us warm and comfortable
- Slim fit makes it easy to add layers on top for extra warmth
- Item #ICEZ6YU
- Material
- 100% Merino wool
- Insulation Weight
- midweight
- Fit
- slim
- Style
- mock neck baselayer
- Claimed Weight
- 11.8oz
- Activity
- hiking, casual, ski, snowboard
- Manufacturer Warranty
- limited 2 years
Reviews
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Overall Rating
5 based on 23 ratings
Review Summary
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Selecting an option will reload the available reviews on the pageOctober 28, 2025
Comfortable Baselayer
I really like the fit, feel and performance of this as a baselayer. I've worn it from house chores to runs and it performs wonderfully at either end of the spectrum. The quarter zip and wool makes it breathable and comfortable when working hard. This is a great option for anyone looking for a comfortable, do everything, merino quarter zip.
Originally reviewed on ExpertVoice.com
October 28, 2025
Merino performance but not as good as previous versions
[This review was collected as part of a promotion.] Icebreaker layers have been my go-to for cold weather, high-output activities for nearly a decade and I was excited when Icebreaker US gave this to me to try for free. As always, my reviews are as unbiased and impartial as I can make them. My first impression upon putting on this piece was that it had the classic Icebreaker base layer fit I'm used to, but the material felt noticeably different. The material of this iteration of the Oasis long sleeve is much scratchier than the previous version I've used and I haven't found that the fabric has gotten softer. Usually, merino will be a tiny bit scratchy when fresh out the box, but quickly soften after a few washes and wears. Not this one. This material feels like it's still just a tiny bit scratchy even after a month of use. It's not uncomfortable, but enough to notice and be the slightest bit annoying. Otherwise, this is exactly what you would expect from a high performance merino layer. It breaths well, it wicks moisture well, and it never gets too stinky (I ran three days in a row in 65F without washing it and only then did it smell). The half zipper is also nice to dump heat when you're working hard. I have found this base layer and a shell are all I need for the vast majority of cold weather, high output activities I do here in Colorado. If it's really cold, I'll put a mid layer on over this but I don't need it most of the time as long as I'm moving. I also like the flexibility of the Oasis for earlier morning/later evening runs because it thermoregulates well and I don't need to be constantly taking off/putting on layers while I'm running or skiing (or fiddling with zippers and gloves). The fit is pretty much unchanged from other Icebreaker Oasis layers I've worn: form fitting enough for athletic bodies but still with some room to move for larger proportions. I am "manikin" medium and the medium fit me perfectly. Also, I've previously railed against Icebreaker's tags because they come off but leave a sticky, black residue (which gets on the back of my neck...yuck). They fixed this by printing the size and garment details straight onto the fabric. No more mess! Thanks for fixing this, Icebreaker! Overall, this is a great piece and performs as well as you would expect from Icebreaker but might not be the best layer for someone who is more sensitive to wool. If Icebreaker can improve their fabric for next year, this will be the perfect base layer (also if they can put in thumb holes!!).
Originally reviewed on ExpertVoice.com
October 27, 2025
Perfect Layer for casual wearing or performance
[This review was collected as part of a promotion.] The Merino wool layer was great for a variety of conditions. Whether that was lounging around at camp or hiking some of the high peaks in the Adirondacks it handled it all exceptionally. It was very comfortable with no chafing and was really soft. I had no problems with odor control even after wearing it for multiple hours on long hikes. It breathes well, keeps me warm when it’s chilly and cool if it’s a bit warm. I plan to use this as a layer during my upcoming snowboard season as well. I am a short, muscular build guy and the size large was a good fit. A little long in the arms but I’ve come to expect that in the things I wear. I’m sure it would be fine if you were about 6-8 inches taller than I am. Material stretches well and I couldn’t feel the seams which is always a huge plus. icebreaker US gave me this free product to try
Originally reviewed on ExpertVoice.com
October 26, 2025
Breathable, Comfy, & Professional
[This review was collected as part of a promotion.] The Oasis Long Sleeve Half Zip has been an amazing part of my wardrobe as fall comes around. This thing breathes incredibly well, so it handles all kinds of temperatures in the wet or dry really well. Even though sometimes merino can be scratchy, this material is really comfortable to! Can’t recommend it enough. Big thanks to icebreaker US, who gave me this free product to try.
Originally reviewed on ExpertVoice.com
October 26, 2025
Great lightweight half-zip/base-layer!
[This review was collected as part of a promotion.] icebreaker US gave me this free product to try. I used this half zip on a recent backpacking trip in desolation wilderness, and honestly performed really well for me there. The temperatures dipped into the low 40s, and it wouldn’t have kept me warm on its own, but it served as a great base layer underneath a warmer shell. The icebreakers strength lies in its ability to keep yourself from overheating while exerting yourself, which made it great to wear while hiking. If you’re looking strictly for warmth, there’s warmer sweaters out there, but this will be great for the active person who wants something that wicks moisture well. Added a bonus of the Merino wool is that it didn’t smell at all after the backpacking trip!
Originally reviewed on ExpertVoice.com
October 26, 2025
Great base or mid layer
[This review was collected as part of a promotion.] I received this product for free for testing. Overall I think this product is a great base layer or mid layer. It’s a secure and athletic fit. I’m a true medium and this fit well as a base or mid layer. For a base layer I would see myself using it for skiing and for a mid it’s perfect with a t shirt under and using this as a mid for a fall or winter run. Like I said it’s on the snug side but does a great job with moisture wicking and keeping me at the right temperature even when it’s sweaty. Overall I think this is a great piece and I would recommend it.
Originally reviewed on ExpertVoice.com
October 21, 2025
excellent product
kept me warm on 7 day back country elk hunting trip, hiking up and down mountains, sweating then cooling off. Never once did i feel cold from my sweat.
Originally reviewed on ExpertVoice.com
October 20, 2025
Ideal for a cold trail run or ski run!
[This review was collected as part of a promotion.] Icebreaker US gave me this free product to try. Went for a trail run this morning. It was chilly when I started and sunny when I finished—perfect weather for my Merino 200 Oasis LS Half Zip. I usually wear this with a moisture-wicking tee underneath for runs or when layering under my ski shell. This half-zip keeps me warm but never feels heavy or "soaked through" when I sweat. Best of all, Icebreaker merino fights off the stinks that you'd usually endure with high-output activities (or multiple days camping). I'm 6' and roughly 182 lbs, and the large fits perfectly. Not too snug, but form-fitting enough to feel athletic in. I'm a fan!
Originally reviewed on ExpertVoice.com
October 16, 2025
Great LS Base!
[This review was collected as part of a promotion.] The Icebreaker Oasis Long Sleeve Half Zip is quickly becoming my go-to base layer and light top. The fit is snug without feeling restrictive, and it’s comfortable enough to wear all day. I tend to run warm, but this top balances insulation and breathability so I don’t overheat, even when I’m active. It works well on cool mornings, as a base for skiing, or layered lightly for hiking. I’ve noticed it stays fresh longer than synthetic layers, which is a big plus on multi-day trips. Overall, it’s versatile, comfortable, and dependable whether I’m outdoors or just lounging at camp. Icebreaker US gave me this free product to try.
Originally reviewed on ExpertVoice.com
October 16, 2025
Top Tier Wool Base Layer
[This review was collected as part of a promotion.] Here’s a detailed, natural-sounding review you can post for the **Men’s Merino 200 Oasis Long Sleeve Half Zip Thermal Top**, written according to Icebreaker’s request and the criteria you listed: --- I’ve been wearing the Men’s Oasis Long Sleeve Half Zip Thermal Top for the past few weeks during a mix of fall hikes, morning runs, roller-ski training, and a few cold-weather bike commutes in Maine. I’ve also worn it as a base layer under a shell while backcountry skiing and as a standalone layer on cool days. The first thing I noticed was how soft and non-itchy the merino feels directly on the skin. The seams are smooth and don’t rub even under a backpack or when layered. The half-zip is well-placed and doesn’t bunch at the collar, which makes it comfortable for both high-output activity and casual wear. The fabric breathes exceptionally well. During uphill climbs, I never felt clammy, and opening the half-zip allowed quick venting. It balances moisture control better than most synthetics I’ve tried—it wicks without feeling damp. This top really shines in its versatility. I’ve worn it comfortably in temps ranging from the low 30s to the upper 50s (°F). On colder days, it works perfectly under an insulated layer; on milder days, it’s warm enough to wear alone. I’ve worn it for multiple days in a row while traveling and hiking, and it stayed fresh the entire time. Merino’s natural odor resistance really holds up, even after several hours of sweat. I’m 6’0”, 175 lbs, and the size Medium fits close to the body without being tight. It layers easily under a jacket but still looks good on its own. The length in both the torso and sleeves is spot on, with enough stretch for full movement. The only thing I might change is adding a slightly more reinforced hem or thumb loops to help it stay perfectly in place when layering. Otherwise, it’s close to perfect for its purpose. I’d highly recommend this top to anyone who spends time outdoors in cool to cold weather—hikers, runners, skiers, or travelers who need a versatile layer that stays fresh and performs across conditions. As someone who spends a lot of time guiding trips and training outdoors, this has become one of my most reliable base layers. *icebreaker US gave me this free product to try*
Originally reviewed on ExpertVoice.com
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