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🧥 Elevate your base layer game — warmth, comfort, and style that won’t quit!
The Merino.tech Merino Wool Base Layer for men features 100% superfine Merino wool in heavyweight (320 g/m²), midweight, and lightweight options, delivering unmatched thermal regulation and softness. Designed for all-season wear, it naturally wicks moisture and resists odor, making it ideal for travel, outdoor adventures, or daily office layering. Each purchase includes premium Merino wool socks and is backed by a lifetime warranty, ensuring lasting comfort and performance.





























| ASIN | B09TPKRRS3 |
| ASIN | B0G3QZJDW6 |
| Age Range Description | Adult |
| Apparel Closure Type | Pull On |
| Apparel Fabric Stretch | Medium Stretch |
| Apparel Fabric Weight Class | Heavyweight |
| Back Style | T Back |
| Best Sellers Rank | #18,263 in Clothing, Shoes & Jewelry ( See Top 100 in Clothing, Shoes & Jewelry ) #4 in Men's Base Layers |
| Brand Name | Merino.tech |
| Color | 320 Black |
| Cuff Type | Plain Hem |
| Customer Reviews | 4.5 4.5 out of 5 stars (5,503) |
| Date First Available | November 24, 2025 |
| Department | mens |
| Fabric Type | 100% Superfine Merino Wool |
| Fit Type | Regular Fit |
| Fit to Size Sentiment | Positive |
| Garment Size Country | United States |
| Global Trade Identification Number | 08062281024498 |
| Import Designation | Imported |
| Is Customizable? | No |
| Item Length Description | Standard Length |
| Manufacturer Part Number | MER-MN-LS-320-BLK-S-T |
| Material Type | 100% Superfine Merino Wool |
| Neck Style | Crew Neck |
| Number of Items | 2 |
| Occasion Type | Vacation |
| Package Dimensions | 10 x 9 x 0.7 inches; 4.8 ounces |
| Pattern | Solid |
| Pocket Description | No Pockets |
| Product Care Instructions | Machine Wash |
| Seasons | All |
| Shirt Form Type | T-Shirt |
| Shoulder to Bottom Hem Length | 27 Centimeters |
| Sleeve Length Description | Long Sleeve |
| Sleeve Type | Long Sleeve |
| Sport Type | Fishing, Hiking, Hunting |
| Style Name | 320gsm Heavyweight |
| Unit Count | 1 Count |
| character | sports |
| collar-type | round collar |
| top-style | T-Shirt |
T**S
Quality!! BUY NOW!!!!
I’m extremely satisfied with the Merino.tech Merino Wool Base Layer – Men’s 100% Merino Wool Long Sleeve Thermal Shirt. The material is outstanding — soft, breathable, and genuinely warm without feeling bulky. You can immediately tell it’s high-quality merino wool. The fit is excellent and true to size. It sits comfortably against the skin, layers perfectly under jackets or sweaters, and doesn’t itch like lower-grade wool. The craftsmanship and stitching feel durable and well made. Delivery was fast, and the product arrived exactly as expected. If you need a dependable cold-weather base layer that performs and feels premium, this is a great choice. BUY NOW!!!!
A**.
Good quality, keeps you warm.
I recently purchased this base layer and I’m honestly very impressed. The material is thick and high quality. You can immediately feel that it’s not cheap or thin like some other base layers. I took it with me on a trip to Armenia where it was snowing heavily and temperatures dropped to -10°C. This base layer kept me warm the entire time. No complaints at all. It fits comfortably, doesn’t itch, and feels great against the skin. It’s warm but still breathable. I even wear it to sleep sometimes because it’s that comfortable. Cold-weather base layer that actually works, this is a great choice. Highly recommend.
S**.
Great for cold weather cycling.
This is a good quality Merino wool thermal base layer. I used it primarily for cold-weather cycling and it performed extremely well. On a recent ride in 20°F temperatures, it kept me comfortably warm without feeling bulky or restrictive. The material seems high quality, well-made and durable. It has a fine, thin feel without being see-through. The black color also matches pretty much anything, if that matters. The set also includes a pair of wool socks that match the quality of the shirt. They’re warm and well made, though a bit too thick for cycling shoes in my case. They’d probably be great for general winter wear or other cold-weather activities. Sizing runs true to size. If you prefer a race-style clinginess for layering under cycling gear, you may want to consider going one size smaller. Overall, this is an excellent base layer for cold conditions, especially for winter cycling.
B**K
Second review, a great bargain 4/5
New review: 4/5 I have purchased 4 of these in the last years. The first ones, reviewed above were very thin and I did not review as good, but these last heavy ones I really like. They are very nice and warm, and they do not pick up any odor. They also fit well if you get the right size, and contrary to some other reviews I read do not get stretched out. The colors though limited are nice and the material seems much heavier and stronger. My only real criticism is that I don't like the logo on the left sleeze. I wish there were a way to remove it. Merino.tech is a good bargain for warm winter clothes. I would recommend and buy again as well. -- old review of lighter shirt -- Seriously, why make something like this if it is so thin as to be see-through. I guess I can put it under a sweater in mild cool weather, but this is not what I thought I was ordering. The free-socks are a nice touch, but it would have been better if they would have added the sock material to the shirt so it was not transparent.
A**R
Fit
I’m a 5’4”, size 14, XL size woman and I prefer to wear 30” tunic length tops. I couldn’t find women’s, merino base layer tunics, in that length for any price! I decided to try a men’s Large and after reading the reviews that stated these shirts are long and reading a review that said the sleeves ran a little short, I ordered this shirt. It is beautiful! It’s butter soft, well made, not scratchy and most importantly it fits! The shoulders and arms are roomy, not baggy. The arm length is a little long on me, as expected, but not too long. The torso length is perfect!!!! It falls just below my hips! It’s kind of snug in the hips, but that’s to be expected in a man’s size and I’m a woman with big hips. I can live with that. I will be ordering a half zip on the same size ASAP! If you’re a medium to large size woman, who prefers tunic length base layers, but can’t find one in women’s sizes, buy this shirt. It’s worth every penny! Well done!!!! Update: I put the sweater through a rinse cycle and reshaped the bottom part it to make it drape around my hips. That worked perfectly! I read a review that stated they thought the sweater had some percentage of spandex. I disagree, because, I would have been unable to reshape the sweater so easily if it contained anything like that. I just wanted to mention that. Thanks for an absolutely amazing piece of clothing!
E**D
Comfort and Quality
These are well made, warm and comfortable. I’ve got one of each (light, mid and heavy weight) and have worn them all winter in cold climates. When layered, with the wool against my skin, I stay warm and dry (very effective at wicking). Being wool, of course, requires special care when washing, but it’s worth the extra effort. I’ve worn Carhartt in the past (and still do), but I’m very fond of these shirts.
L**O
Warm, breathable, and great fit
Got the 250g version and used it for a volcano hike at 0°C (32°F)—kept me warm the whole time. Even after sweating, it didn’t smell and stayed breathable. I bought top and bottom separately for a better fit and the sizing chart was accurate. The bonus socks were amazing too—super cushioned and very useful.
A**A
The best
Excellent! I got the thinnest one. It stretches, it breathes, it dries, it wicks, it is warm, it is cool. This is why high quality wool cannot be beat. Take care of it. I’m gonna buy another now so I have two for an upcoming trip !
S**A
¡¡¡Me encantó!!! Es mejor de lo que esperaba! Todo lo que se menciona es cierto: Se siente increíble, se ve genial, después de un día completo usándola, solo olía a nuevo!! Es perfecta!! Además, incluyeron un par de calcetines que también me encantan!!!... Actualización- Las otras dos playeras que pedí, llegaron sin calcetines y no los envían a México :(; Además la segunda playera que pedí, no parece tener la misma calidad, es más áspera y no parece tener las mismas propiedades
P**O
Compré la camiseta de 250 con mangas largas en talla 2XX, y me quedó a la perfección, de hecho la lana no es tan rígida qué puede inclusive quedarle a alguien más grande (aunque es fit, puede quedarte olgado, cómo una talla extra, el pago de las mangas es perfecto para alguien talla 4-5 y el pago de la camisa al frente es más corto qué el la espalda, lo cual s esperado). Super cómoda, proporciona calor y tiene buena transpiración, el color negro es de verdad negro oscuro. Los calcetines con los que llegó de regalo son super suaves y cómodos, con el grueso ideal para usarlos con mis botas Ultra de Salomon. Con el tiempo genera un poco de pelusa la prenda, pero es lo esperado.
T**A
The colour and size were correct but cetrtainly not the 250GSM (no indication given in merchandise). From my experience as owner 0f 7 pieces (heavy, medium and light), it is certainly lightweight (160GSM). The only indication is100% Superfine merino wool. Made in P.R.C Reasons for my poor assessment 1. I bought this item with the promise of discount. The seller did not honour the discount 2.Seller choose not to response to my request for either RETURN and REFUND or Just honour the promise of discount and pay me the difference I write to share with future buyers, just be careful. I thank AMAZON for allowing me to amake a claim
N**E
Love it. I took the plunge in a Merino.tech t-shirt last summer and I love it. I got this in the winter, mainly for when I'm on my motorbike. It's a top quality item. Very comfortable and warm. When worn over another merino top it's a great combination. I'm sold on merino - it is worth the cost. This is now my go-to brand for all my merino clothing. Oh, you sometimes get free merino socks too. They are also very nice on a motorbike in winter...
C**R
J'utilise ce sous-pull Merinos Tech pour mon activité professionnelle, un métier qui demande beaucoup de mouvements et une exposition à des températures variées. Ne connaissant pas le mérinos, je suis satisfait des propriétés de ce vêtement. Points forts techniques : Le rapport entre la finesse du tissu et le confort thermique est efficace. Malgré sa légèreté, il protège bien du froid tout en évacuant l'humidité. J'ai constaté une absence d'odeurs de transpiration après une journée complète d'utilisation, ce qui confirme les propriétés naturelles de la matière. Coupe et ergonomie : Le vêtement est bien long, ce qui est un avantage majeur : il reste bien en place et protège le bas du dos même lorsque je dois me baisser ou m'accroupir de façon répétée. Concernant la taille, notez qu'il taille plutôt grand. Étant entre deux tailles, j'aurais dû choisir la taille en dessous pour un ajustement plus précis. Entretien et livraison : Après un premier lavage, le produit conserve sa forme et ses propriétés. La livraison a été effectuée dans un emballage souple simple, ce qui est tout à fait adapté pour ce type d'équipement technique où l'on cherche l'efficacité avant le packaging de luxe. En conclusion, c'est un produit performant et adapté aux contraintes d'un métier de terrain.
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