Merino.tech 100% Merino Wool Base Layer Mens - Thermal Underwear Long Johns

Great, thin, warm, comfortable woolies. I would by again. They pack small, wear comfortably and are very warm without being overly-warm. They are thin and fit great underneath anything.

Excellent fit and comfort and warmth

The only way to know if this garment is comfy, warm, non-itching and fits well is to ... wear it. I did exactly that shortly after I received it. I wore it for 3 straight days. I notice the top is pilling a little bit (what else should you expect from wool), but the top and the bottoms held up to one cycle in gentle wash. The garment instructions that came on a printed card with the piece say something a bit different from the instructions printed on the garment. For example, the card instructions say NOT to place in the dryer, but the instructions on the piece itself say "Turn inside out. Machine wash cold on gentle cycle with like colors. Lay flat to dry recommended or machine dry on low heat. Do not bleach. Do not dry clean, Do not wring dry." So it seems they don't recommend using a dryer, however a fluff cycle in the dryer is the best way we know of to get pet hair off... so that's what we opt for before - or after - laying it out flat to finish dry. I do notice that the tag (which I summarized above - and have included a photo of) is likely to come off... but those tags are often a comfort nuisance. You DO need a magnifying glass to read that tag! I also notice that the pieces we received were made in China (PRC). The fit is good, comfy, and just like the top it's warm, non-itchy with no abrasive seams to irritate my skin. We all have probably had an experience of getting a garment with a tag that is so annoying that you want to rip it off ASAP - either because the tag itself is scratchy or the sewing holding the tag to the garment is obnoxious. This tag is long and thin, but not annoying. How well it will hold up to use remains to be seen... but I don't see anything that makes me think it is likely to fall apart or get threadbare easily. Indeed, the best thing I can say about this garment is that it is MORE comfortable AND warmer than the cotton long johns I have. Cotton is pretty miserable thing to have next to your skin in the cold when you sweat or it gets wet. All the pieces I've purchased so far come with a free pair of Merino socks. The socks are not very thick, but they do seem ok.

I've been wearing this merino wool Base Layer and it's been awesome—especially when that unexpected snowstorm hit. The 100% superfine 17.5-micron merino wool is super soft, never itchy, and doesn’t feel heavy or bulky, even after a full day out. The warmth is impressive, and I love how the wool's moisture-wicking keeps me dry and comfy no matter the conditions. The fit is just right, with no bunching or overheating, which is a big upgrade from regular cotton. The packaging was actually pretty cool, and the included merino hiking socks are a nice extra. My feet was dry by the end of the day. My only hesitation is about the care instructions—it says to hand wash and lay flat, but I’m tempted to try the washer to see how it does. I liked my Smartwool before because you could just toss it in the washer, but that was only 81% wool. Overall, I'm really happy with this one! I bought 2 more.

I purchased these for my son who moved to Chicago. Size is accurate, and is thin enough so that my son could stay warm and move without restrictions while playing sports. The style is as shown and can worn under athletic gear. My son has never lived in cold weather, but he loves his thermals because they keep him comfortably warm during the Chicago Winter season. Highly recommended! Worth the price!

I picked up the medium black 250 and it’s been perfect for cold weather riding and chilly workdays. I’m 5'10" and 180 lbs, and while the fit is a bit loose, the length is perfect. After 2 years of regular use, it’s still going strong—just a minor hole at the ankle, easily hidden by socks. Pros: ✅ Great Cold-Weather Warmth (250 Weight) – Warm enough that I haven’t needed to upgrade to 320 ✅ Ideal for Motorcycle Rides & Cold Work Days – Keeps me warm without bulk ✅ Socks Are High Quality – Cozy and well-made ✅ Durable Over Time – Still in good shape after 2 years Cons: ❌ Slightly Loose Fit (Medium on 5'10", 180 lbs) – Not overly baggy, just not snug ❌ Minor Wear – Small hole near ankle, but nothing major Final Thoughts: Whether you’re riding in the cold or braving freezing temps at work, this base layer does the job exceptionally well. Warm, breathable, and built to last—an excellent investment for cold-weather comfort.

Bought these as a Christmas gift. Husband loves them, wore them all winter long and the added pair of socks were a great bonus one of his favorite pairs! Super soft, very warm. Only complaint is they get peely after washing but they are an under layer so it doesn’t matter.

It’s actually absurd how nice these are, I’ve had them 2 weeks and literally can’t take them off. I used to use traditional long John’s and switched to poly probably 5 years ago. There’s really no reason to not go wool, they are more expensive but can be used in place of 3 or 4 poly base layers. I washed them once just because, but after wearing them for 5 days literally still smell like fresh laundry. Probably the most comfortable thing I’ve ever put on. I have the heavyweight option and they are at least on par with super heavyweight fleece base layers as far as warmth goes, but in a different universe of breathability. Didn’t understand how these reviews were so raving, but now I get it. There’s no way I could wear anything else now, it’s an item that just makes life better

J'ai acheté ce sous-vêtement car j'ai une forte frilosité de façon généralisée, même à la maison. Il est confortable, tient chaud et permet de mieux supporter cette frilosité. Je suis content de mon achat. Une paire de chaussettes était présente. Je ne peux me prononcer, je n'ai pas testé.

Perfecto para Islandia en octubre, lo aprovecharé para invierno ir a la nieve. Un 10

Ich habe die Merino‑Baselayer Hose (Herren) über mehrere Abende auf verschiedenen Weihnachtsmärkten getragen – bei Wind, Nieselregen und Temperaturen knapp über 0 °C. Mein Eindruck: angenehm warm, spürbar trocken und kein Kratzen. Genau das, was man sich unter Jeans oder Thermohose wünscht, wenn man stundenlang draußen steht. Praxiseindruck (real getestet) Wärmeleistung: Hält die Beine konstant warm, auch im Stand – perfekt für Glühwein‑Schlangen und bummelnde Runden. Feuchtigkeitsmanagement: Unter der Winterjacke wird’s schnell warm; an den Beinen blieb es trocken. Schweiß wurde gut abtransportiert, ohne feuchtes Kältegefühl. Tragegefühl: Weich, elastisch und kein Jucken. Sitzt körpernah, ohne einzuengen – unter Jeans unauffällig. Geruch: Nach mehreren Stunden draußen neutral geblieben; ideal für mehrtägige Märkte oder Reisen. Pflege: Nach der Wäsche Form stabil, kein Verziehen; Trocknet vergleichsweise schnell. Verarbeitung & Passform Elastischer Bund und flache Nähte – bequem, kein Scheuern. Länge fällt leicht sportlich aus (bei mir bis knapp über den Knöchel) und passt gut in Stiefel oder hohe Sneaker. Stoff fühlt sich dichter an als klassische Funktionswäsche, bleibt aber beweglich – gut für längere Wege zwischen Buden. Für wen passt das? Pendler & Marktgänger, die viel stehen und frieren vermeiden wollen. Reisende oder Festival‑Besucher, die geruchsarme und schnell trocknende Unterzieher bevorzugen. Kleiner Hinweis (authentisch) Wenn du zwischen zwei Größen liegst, eher die größere wählen – der sportliche Schnitt sitzt körpernah. Für extrem windige Tage empfehle ich zusätzlich eine Windtight oder eine gefütterte Außenhose. Warum ich die Merino‑Baselayer Hose empfehle: Warm & atmungsaktiv für kalte Outdoor‑Events Weich & kratzfrei – angenehmes Hautgefühl über Stunden Geruchsarm, ideal für mehrtägige Nutzung Unter Jeans kaum sichtbar, alltagstauglich Pflegeleicht & formstabil nach der Wäsche Fazit: Für lange Abende auf dem Weihnachtsmarkt und kalte Outdoor‑Tage ist diese Merino‑Baselayer Hose eine sehr überzeugende Wahl. Sie kombiniert Wärme, Komfort und Alltagspraktikabilität – genau das, was man in der Winterzeit braucht.

el pantalon un poco largo, pero de una textura extraordinaria. pide solo large en vez de x-large-

Bought these for hikes and camps. I got the middleweight version and these are perfect for all but the warmest days when hiking, and great for keeping you warm at camp later. Bear in mind that sleeping bag temperature ratings are stated for a person wearing base layers like this so they're a must have if you want to be safe when approaching the comfort/limit temps of your bag. I'm a larger fellow and have had no issues with the fit. I actually ordered XL as opposed to XXL I often am in other clothing and the fit is fine, and they're quite stretchy so will hopefully continue to fit for some time as I lose weight. They don't fall down or anything and they are very good at stopping thigh chafing which is a huge issue for me if I don't wear something like this. The material is extremely warm and soft and comfortable and you forget you're wearing it (except for not feeling the wind chill on your legs on the summit). They'd be a little revealing on their own so I wear them under some lightweight sports shorts. They're not itchy or scratchy at all. I sweat quite a lot and they wick sweat away incredibly well and it's surprising just how well they keep your body at a comfortable temperature regardless of the conditions. They even keep you warm when they're wet from the rain, although I do still pack a spare dry synthetic pair of leggings (I'd pack another wool one but I can't afford it!) for sleeping in if I've got soaked on the hike. The anti-smell properties are great also - I can walk up a mountain, camp at the top, walk down, and take them off and smell the crotch area and it smells fine. If you were using them as longjohns under other clothing you could easily get a few days out of them. I did try them while running and they do stop chafing and help stop you getting cold while standing around in 5 degree weather waiting for a parkrun to start but even in that weather I found them quite warm after running a while so for this purpose, I'd probably get the lightweight pair instead. Washing them has been easy. I turn them inside out and wash with a wool detergent (nothing fancy, just ASDAs own), using the wool setting on my washer along with the other wool items I own. Then dry on an airer. Not noticed any damage from this so far. I got the black which look really good and go with anything but as we need to become more aware of ticks as time goes on, I'd probably get another colour now just so checking for them is easier.