100% Merino Wool - Midweight · 250, GSM
Camiseta térmica de manga larga para hombre Merino 250, azul cobalto
4.56418 reviews250 GSM is our everyday cold-weather standard — warm enough for winter city days, breathable enough for the trail.
Fabric weight guide
Which merino weight is right for you?
GSM is grams per square metre — how much fabric there is, not a warmth rating. Every weight is the same soft 17.5-micron Australian merino: it wicks sweat before it turns cold, insulates when it is cold and ventilates when it is warm. Lighter fabric breathes and dries faster; heavier fabric holds more heat when you stop moving. Choose by season and by how hard you will be working.
Warm & hot weather · 60°F+ / 15°C+ — and high effort in any season
Best for: summer hiking, running, cycling, hot-climate travel, everyday tees and office wear; the next-to-skin layer under a 250 when you work hard in winter
Pick this if: you want a shirt that stays fresh for days, dries in an hour and keeps you cooler than cotton in the heat — or you simply run hot
Think twice if: you will mostly be standing still in the cold; on its own a lightweight layer has little insulation to offer
Cool to mild · 40–65°F / 5–18°C
Best for: spring and fall as a standalone top, summer evenings, cool-morning hikes and commutes; winter as a base under a mid-layer
Pick this if: you want one merino layer that covers most of the year, or you are unsure between light and mid — this is where most people should start
Think twice if: you run cold and your winter is genuinely cold: go straight to 250
Cold · 20–45°F / −7–7°C — the classic winter base layer
Best for: skiing and snowboarding, winter hiking, cold-weather work, frosty fall mornings; top-and-bottom sets so your legs are not the weak link
Pick this if: you run cold in fall, want the classic winter base layer, or spend active days below freezing under a shell
Think twice if: you overheat easily on hard uphill efforts — a 165 or 190 underneath, 250 over it, is the better system
Deep cold · below 25°F / −4°C — especially when you stop moving
Best for: ice fishing, hunting stands, camp at altitude, winter mornings spent waiting rather than walking, a house that never quite gets warm
Pick this if: warmth matters more than breathability, you are chronically cold, or your winter involves long spells standing still outdoors
Think twice if: you will be working hard — it is too warm for a sweaty climb, which is exactly the point
A base layer works by sitting close to the skin, where it can move moisture — loose is not more comfortable, just slower. Between sizes? Size down for a next-to-skin layer under a shell, size up to wear it on its own or over another layer. Merino stretches with wear and springs back after a wash. Heavier weight is not itchier: itch comes from coarse fibre, and every weight here is the same superfine merino.
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Description
Descubra el equilibrio ideal entre comodidad y versatilidad con nuestra camiseta de manga larga de lana merino de peso medio.
Confeccionada con lana merino 100% natural, esta camiseta ofrece una suavidad y calidez excepcionales.
El diseño de peso medio ofrece el grosor relativo perfecto, lo que la hace adecuada para diversas temperaturas. Ya sea que se enfrente a días más frescos o que agregue una capa en climas más fríos, esta manga larga se adapta a sus necesidades.
Care
Washing and Drying Instructions
- Turn Inside Out
- Machine Wash Cold: Gentle cycle with like colors
- Detergent: Mild or wool-specific
- Lay flat to dry
- Storage: Wash before storage and keep in a dry place, using airtight containers or vacuum-sealed bag to prevent moth.
- Do NOT Use: Fabric softener or bleach!
Guarantee
- 30 Day Satisfaction Guarantee
- 1 Year Warranty
THE FABRIC
WHY MERINO WOOL
01INSULATES WHEN WET
Wool has the remarkable ability to absorb up to 30% of its weight in moisture without ever feeling wet or sticky. In the event that it does become wet, wool outperforms cotton and polyester materials by providing superior insulation.
02ANTI-MICROBIAL
Merino Wool fibers possess a natural ability to repel bacteria in moisture or sweat, effectively wicking it away. This means you can wear our products without worrying about foot fungus or unpleasant odors.
03FIRE RESISTANT
Merino Wool offers excellent insulation against high temperatures and has a natural resistance to catching fire. In the rare event of ignition, it self-extinguishes without melting and adhering to the skin, unlike synthetic fabrics.
THE FABRIC
01MOISTURE WICKING
Merino Wool regulates moisture levels on your skin by absorbing any perspiration or sweat from your body, allowing it to evaporate from the fabric into the surrounding atmosphere.
02UV PROTECTION
Leave your sunburn worries behind as you ascend to sunlit peaks. Our lightweight layers provide a UPF rating of 25, while the midweight and expedition options offer an even higher UPF rating of 50+
03RENEWABLE
Merino Wool boasts a minimal environmental footprint and seamlessly reintegrates into the natural world. Shear a merino sheep in the morning, and by afternoon, they're happily grazing their way towards renewing next season's wool clip
Here are actual measurements for a size Medium. I wish every garment company and reviewer would do this. I'll follow with my measurements and how it fits.Dimensions with top laid flat:Chest width: 20 inchesWidth at bottom: 19 inchesLength from center of neck at collar down shoulder to wrist: 36 inchesLength from armpit seam to wrist: 21.5 inchesLength from rear of collar to bottom: 29.5 inchesLength from from of collar to bottom: 24.25 inchesWidth at wrist opening: 4 inchesMy dimensions:Height: 5 feet 10 inchesNeck circumference: 13 inchesLength from center of neck at collar line down shoulder to wrist: 33 inchesLength from armpit to wrist: 18.5 inchesChest circumference: 38 inchesWaist circumference at naval: 31.5 inchesWaist circumference at hip bones: 32.5 inchesBicep circumference (not flexed): 11 inchesWrist circumference: 7 inchesI weigh 140 lbs.This top fits me slightly loose. It's not tight like a compression top, but still clings close enough to allow this to fit comfortably under another shirt. The material itself can stretch about 50%. For instance, the wrist width is 8 inches circumference unstretched, and 11.5 inches fully stretched.The garment is very soft and not itchy. I have eczema and this material is not irritating at all.I posted a photo of the washing instructions tag.
Here are actual measurements for a size Medium. I wish every garment company and reviewer would do this. I'll follow with my measurements and how it fits.Dimensions with top laid flat:Chest width: 20 inchesWidth at bottom: 19 inchesLength from center of neck at collar down shoulder to wrist: 36 inchesLength from armpit seam to wrist: 21.5 inchesLength from rear of collar to bottom: 29.5 inchesLength from from of collar to bottom: 24.25 inchesWidth at wrist opening: 4 inchesMy dimensions:Height: 5 feet 10 inchesNeck circumference: 13 inchesLength from center of neck at collar line down shoulder to wrist: 33 inchesLength from armpit to wrist: 18.5 inchesChest circumference: 38 inchesWaist circumference at naval: 31.5 inchesWaist circumference at hip bones: 32.5 inchesBicep circumference (not flexed): 11 inchesWrist circumference: 7 inchesI weigh 140 lbs.This top fits me slightly loose. It's not tight like a compression top, but still clings close enough to allow this to fit comfortably under another shirt. The material itself can stretch about 50%. For instance, the wrist width is 8 inches circumference unstretched, and 11.5 inches fully stretched.The garment is very soft and not itchy. I have eczema and this material is not irritating at all.I posted a photo of the washing instructions tag.
Comfortable a d very warm even for the thin one
Comfortable a d very warm even for the thin one
This 250g merino.tech top, sold by Merino US, is a thin, lightweight top, that I use as a base layer or would possibly use as a second layer, but only over another very tight fitting wool layer. I am a muscular and lean 5’9”, 175 lbs. My chest is on the small end of their medium sizing at 39”. This medium is form fitting, but loose compared to an athletic compression style top. For me, the neck is cut slightly lower than i am used to and the sleeves are a bit long, causing it to bunch up a bit along the length of the arm, but not enough to complain about it. I am just used to having a base layer be very tight fitting. My actual garment sleeve length measured 25 1/4" from the shoulder seam to the sleeve, which was spot on with one sizing chart, but different from a second sizing chart that advertises 24". The wool is soft and non-itchy. I stay warm while wearing the top by itself and especially when used under another layer/jacket. It breathes extremely well during moderate activity. I haven’t tested it yet under heavy exercise. I don’t really want it to shrink so I have only washed it on delicate/cold cycle and air dried, so I can’t speak on the long term durability, but wouldn’t recommend regular washer/dryer care, although they do claim a lifetime warranty. Their warranty statements are a bit confusing to me, as I read “lifetime warranty” and “110% Happiness Guaranteed Policy”, but also read “60 days for hassle-free refund, exchange, or replacement”. Perhaps I’m naïve, but I am overlooking the “60 days” statement and trust they’ll take care of it if I have a problem with the top in the future. I’d like to have several tops like this, but to me merino wool garments are very expensive. With that being said, their price is one of the lowest I’ve found. My order arrived in 2 days.
This 250g merino.tech top, sold by Merino US, is a thin, lightweight top, that I use as a base layer or would possibly use as a second layer, but only over another very tight fitting wool layer. I am a muscular and lean 5’9”, 175 lbs. My chest is on the small end of their medium sizing at 39”. This medium is form fitting, but loose compared to an athletic compression style top. For me, the neck is cut slightly lower than i am used to and the sleeves are a bit long, causing it to bunch up a bit along the length of the arm, but not enough to complain about it. I am just used to having a base layer be very tight fitting. My actual garment sleeve length measured 25 1/4" from the shoulder seam to the sleeve, which was spot on with one sizing chart, but different from a second sizing chart that advertises 24". The wool is soft and non-itchy. I stay warm while wearing the top by itself and especially when used under another layer/jacket. It breathes extremely well during moderate activity. I haven’t tested it yet under heavy exercise. I don’t really want it to shrink so I have only washed it on delicate/cold cycle and air dried, so I can’t speak on the long term durability, but wouldn’t recommend regular washer/dryer care, although they do claim a lifetime warranty. Their warranty statements are a bit confusing to me, as I read “lifetime warranty” and “110% Happiness Guaranteed Policy”, but also read “60 days for hassle-free refund, exchange, or replacement”. Perhaps I’m naïve, but I am overlooking the “60 days” statement and trust they’ll take care of it if I have a problem with the top in the future. I’d like to have several tops like this, but to me merino wool garments are very expensive. With that being said, their price is one of the lowest I’ve found. My order arrived in 2 days.
I am a tall woman, I had to buy a mens shirt in order for it to fit correctly. It would be much appreciated if you carried womens shirts in tall sizes. Thank you.
I am a tall woman, I had to buy a mens shirt in order for it to fit correctly. It would be much appreciated if you carried womens shirts in tall sizes. Thank you.
very comfily
very comfily
This is the second sweater I've bought for my husband, and he loves it. I also have a crewneck sweater, which I love. Both of us have long arms, and the sleeve length is perfect, which isn't always the case with anything long-sleeved. We'll be back for more!
This is the second sweater I've bought for my husband, and he loves it. I also have a crewneck sweater, which I love. Both of us have long arms, and the sleeve length is perfect, which isn't always the case with anything long-sleeved. We'll be back for more!
My son received his parcel from you and he loves both the top & bottom layers. These are really needed at this time since he lives in a CA mountain community which has lost electrical power and it is very chilly in his home. Many thanks!
My son received his parcel from you and he loves both the top & bottom layers. These are really needed at this time since he lives in a CA mountain community which has lost electrical power and it is very chilly in his home. Many thanks!
Love these for cold weather protection and so soft that I use them as loungers indoors. Great quality!!
Love these for cold weather protection and so soft that I use them as loungers indoors. Great quality!!
IComfortable to wear
Fits a bit loose for ones size.
IComfortable to wear
Fits a bit loose for ones size.
I didn't think it would be warm because it is thin but preformed better than I though. The free wool socks is a big plus.
I didn't think it would be warm because it is thin but preformed better than I though. The free wool socks is a big plus.
I despise putting on layers. I abhor taking off layers. This med weight base layer is waaaaay comfy and will probably enable me to reduce the number of layers preventing my skin from mingling with the ambient atmosphere.
I despise putting on layers. I abhor taking off layers. This med weight base layer is waaaaay comfy and will probably enable me to reduce the number of layers preventing my skin from mingling with the ambient atmosphere.
Warm comfortable and sized right for my 6’2 frame. Sleeve length is just right.
Warm comfortable and sized right for my 6’2 frame. Sleeve length is just right.
Questions people ask about merino
What is merino wool, and what makes it different from regular wool?
Merino wool comes from Merino sheep and is measured in microns — the thickness of a single fibre. Merino.tech uses 17.5 micron Australian merino, which is roughly a third the thickness of the coarse wool most people remember from old jumpers. Finer fibres bend against the skin instead of pressing into it, which is why merino feels soft rather than scratchy while still insulating, breathing and resisting odour naturally.
Is merino wool itchy?
No. Itch is caused by fibre diameter, not by wool itself. Fibres above roughly 22 microns are stiff enough to trigger the prickle response; ours measure 17.5 microns, well under that threshold. Every piece here is 100% Australian merino with no synthetic blend in the body fabric, so there is nothing rough sitting against your skin.
How do I wash merino wool without ruining it?
Turn the garment inside out, machine wash cold on a gentle cycle with like colours, and use a mild or wool-specific detergent. Lay it flat to dry. Never use fabric softener or bleach — softener coats the fibre and destroys the breathability you paid for. Merino resists odour, so you can wear it several times between washes, which is the easiest way to make it last.
Is merino wool warm enough for real winter?
Warmth is set by fabric weight, measured in grams per square metre. 165 and 180 are lightweight layers for runs and mild days. 200 is the everyday weight. 250 covers autumn through proper cold and is the most popular choice for skiing and hiking. 320 is heavyweight, made for standing still in real winter — ice fishing, chairlifts, cold work outdoors.
Does merino wool shrink?
It can, but only under heat and agitation. Hot water and a tumble dryer cause the scales on the fibre to lock together permanently. Cold water, a gentle cycle and flat drying prevent it entirely. Follow that and the garment keeps its shape for years.
