

🔥 Stay warm, dry, and fresh—Merino.tech is your year-round performance secret!
Merino.tech’s Men’s Merino Wool Base Layer Set offers premium 100% superfine 17.5 micron merino wool in three weights (light, mid, heavy) for tailored thermal control. Designed for active professionals and outdoor enthusiasts, it delivers unmatched softness, moisture-wicking, and odor resistance. The set includes a midweight top and bottom plus a free pair of merino hiking socks, making it a versatile, durable, and comfortable foundation layer that keeps you perfectly regulated and fresh through demanding conditions.






























| Care instructions | Machine Wash |
| Fabric type | 100% Superfine Merino Wool |
| Origin | Imported |
M**H
Even a Sasquatch would like these
Bought this as gift for my skeptical Salt of the Earth Hubs who was not aware yet of the true superiority that is merino. His face dropped and I had to put his chin back into place when he asked How Much. I was utterly unfazed and ignored his protest. I easily got past his merino gear green inexperience and told him to ‘just try them because these will change your life’ with a grin. To put it short and sweet: He proceeded to basically only take them off to wash over the next five months. His only comment, actually Using His Words: he wanted another set. This, so he always had some clean and multiple weights so he could regulate better and choose depending on the weather forecast for the day he’d be out. I noticed his old synthetics were crumpled in the bottom of his gear bags when he’d come home. The merino were always within reach on top, and gasp, folded! High Praise from this man, folks. It should be stated he is THE case for the legitimacy of merino, and these extremely well priced merino sets: he is a heavy equipment operator that works outside on top of mountains in some of the most extreme winter environments on earth and loves it. For you, the reader’s purpose, let’s just agree to put aside the elephant-in-the-room Crazy Factor of that last sentence for now and stick to the underwear. All I can say in his defense is this world takes all types. That’s only important here to mention since he’s not a dude that sits around in it next to a cozy fire all winter sipping from a tea cup. (That’s my job, lol.) This set was put to a legit durability test and in incredibly harsh conditions and stood up. Once prompted for more detail, and translating out of his customary grunts, shrugs and sighs, he said [paraphrasing]: he stopped noticing whether or not his body was cold or hot since he was the perfect temperature all the time and stopped sweating whether in or out of a machine. He didn’t have to wear nearly as many layers in general. He didn’t have to strip ones off or put other ones on depending on where he was and what was happening nearly as much. He stayed warm even when outer gear got wet with frozen sleet driving and he had to move back and forth outside from truck to machine to truck. He wasn’t losing gear and other layers from job sites, trucks, machines or in the snow nearly as much either from stripping off and forgetting. The merino set remained odor free for an entire work cycle between washings so he reused them everyday. They stayed true to fit and didn’t stretch out of shape even wearing for long periods and for multiple days in a row. All day comfort second skin feel. No bunching in the armpits nor crotch. Ordered the 2XL, biggest they offer I think. He’s normally 3XL big and tall, so I wasn’t sure if these would fit but as a first or second layer snug is good. His back and shoulders can be a challenge to find proper fit for and I often tailor his clothes and gear, but these are perfect with long arms and a long torso design to accommodate various sizes and shapes. Spare to tuck in even! Fantastic!: This is important since he sometimes has to do mechanical repair on the fly. On top of a mountain on the machines, before this merino set, his lower back would sometimes come home chaffed and raw from cold exposure from these situations. A red burn from bending over with elements beating on him, not wanting to touch his clothes since his hands and outer gear coated with grease, tucking back is not a desirable option. The winds are basically trying to tear everything off so to have it stay in place and enough fabric to remain tucked in? chef kiss. Going into this next winter season depending on where he is going this year, we’ll get another set at a different weight. He said he wanted that versatility this time.
M**.
Great for cold weather running
These keep me warm while running down to about 25°F. I live in a warm climate, so I can't handle the cold as well as others, but occasionally I have to run when it's cold out. These are super thin and light weight, they're really comfortable and soft, and they fit perfectly.
S**E
Excellent Base layer!
Worth every penny. My husband works outside and this keeps him so warm under his clothes. Feels great, He is 5"11 240lbs. Use size chart to get correct size.
O**K
Warmth, comfort, and WOOL
This was a gift for my partner/best pal ever. He loves them. I also have my own and they work wonderfully as a layer in the cold weather. They are smooth and flat so that they can layer underneath almost anything. They provide warmth as well as block air that can pass through regular apparel. I would buy them again for myself and as a gift. The gift set with the beanie and socks was such a neat bundle as well!
E**K
Merino.tech Merino Wool Base Layer Mens Set - Heavyweight 320 NOT PERFECT BUT GOOD ENOUGH
Merino.tech Merino Wool Base Layer Mens Set - Heavyweight, Midweight, Lite Merino Wool Thermal Underwear For Men Top, Bottom ...the 320 is nice and warm. the 250 has been my favorite. the 250 fit the best for me. the other 2 weights fit more snug. will try to treat these with lanolin. no itch btw.
S**P
Expensive but well worth it
I've had this for about 2 years of worn it in the deepest cold of winter, the quality is extremely high it's correct what they say you can wear it outside as is in about 20° weather and stay warm I needed something for my motorcycle how I wash it is on a general wash and I hang dry technically you're not supposed to hang it cuz it will stretch the wool but I do and it's fine after one day of drying yes it's expensive but it's well worth it!
K**K
Best base layer I’ve ever purchased.
Top notch base layer. Bought this for my wife and I and it’s very warm & very comfortable. It didn’t shrink at all when washing and drying. I’ve used many base layers over the last 30 years and this is by far the best. We both got the 250.
K**E
Fantastic for if you want to be warm, but also keep using your usual clothes!
I got the heaviest one 320, It's pretty stretchy so as long as you're close to the right size then you shouldn't have a major issues the fit. do be careful that it's not too wrong though since if the material gets too stretched it's start's to not keep you as warm! I live in the mid west and got this for the winter since I needed a new pair. It gets pretty cold down here for the winter so Merino wool base layer's are really nice to keep warm on those 10 degree Fahrenheit days. You do have to be more careful when washing these base layers than polyester base layer's, but these ones don't smell awful so I would always recommend this over polyester base layers. Personally from my experience, I would say get the heaviest thickness. I walk around a college campus and even with the heaviest size I'm always cool enough for the whole class. Merino wool is quite good at keeping sweat off of your and not getting too hot. Over all it works very well, isn't too heavy even if you get the thick one, and pretty stylish, you won't have any issues with it being obvious that your wearing a thick base layer underneath your usual clothes!
Trustpilot
2 months ago
2 months ago