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🧥 Stay warm, fresh, and unstoppable in Merino.tech’s heavyweight base layer set!
This 100% superfine merino wool base layer set for men features a heavyweight 320 g/m² fabric that provides superior warmth and breathability. Designed with natural moisture-wicking and odor-resistant properties, it ensures all-day comfort and freshness even during extended wear. The quarter zip thermal top and matching bottoms offer a modern fit ideal for layering, while UPF 50+ protection shields you from harmful sun rays. Backed by the Merino.tech promise, this set is machine washable and built for durability, making it the perfect choice for professionals and outdoor enthusiasts seeking premium performance and style.







































| ASIN | B0BDZLTZJ7 |
| Age Range Description | Adult |
| Apparel Closure Type | Pull On |
| Apparel Fabric Weight Class | Medium Weight |
| Best Sellers Rank | #201,268 in Clothing, Shoes & Jewelry ( See Top 100 in Clothing, Shoes & Jewelry ) #106 in Men's Base Layers |
| Brand Name | Merino.tech |
| Care instructions | Machine Wash (Delicate Cycle), Hand Wash Recommended |
| Collection Name | All |
| Color | 320 Charcoal Grey Zip-up |
| Customer Reviews | 4.5 out of 5 stars 207 Reviews |
| Fabric Type | 100% Superfine Merino Wool |
| Fabric type | 100% Superfine Merino Wool |
| Fit Type | Regular |
| Fit to Size Sentiment | Fits True To Size |
| Garment Size Country | United States |
| Import Designation | Imported |
| Item Type Name | Base Layer Set |
| Manufacturer Part Number | MST-250 |
| Material Type | 100% Superfine Merino Wool |
| Neck Style | Crew Neck |
| Number of Items | 1 |
| Origin | Imported |
| Package Quantity | 1 |
| Pattern | Solid |
| Product Care Instructions | Machine Wash (Delicate Cycle), Hand Wash Recommended |
| Size | Medium |
| Sleeve Length Description | Long Sleeve |
| Sleeve Type | Long Sleeve |
| Style Name | Modern |
| Style Number | Set |
| Unit Count | 2 Count |
D**L
Not sure how they could be better
I bought these for a kayaking trip in the arctic (Svalbard) and they were perfect. I had previously gotten the 1/4 zip mid-weight and I'm not sure how they could be better. They are soft, keep you at just the right temperature and don't keep any odor, even after continuous wearing (sleeping, paddling, hiking, polar bear watch, etc.) for several days. I machine wash on delicate, air dry in the dryer for maybe 30 minutes and then finish drying on a hanger. Worth every penny. Get the charcoal rather than black. It looks awesome.
B**N
Worth it
5’10” 190lbs size L fit perfect. Was a great base layer while deer hunting in November in Wisconsin. Super warm and super soft. Didn’t get stinky like polyester or polypro does, even after 4 day hunt.
A**S
Don’t throw in clothes dryer
Don’t put in clothes dryer.. hang or lay flat to dry These are exceptionally warm long Johns!! There’s no sweating while wearing them in the zero degrees weather.. they will last a long time if you take care of them.. and the socks and beanie are great also.. NO sweating on your head or feet!
D**E
It’s warm and comfortable
It fits well and it helps to keep warm. It feels soft and the quality is better than expected. It doesn’t feel heavy and it seems to be quite durable. I’ll be getting one for myself since they are good to have around.
K**G
Hubby approved!!
Bought as Christmas present, husband loves them. He’s a very slim and tall Size M, he loves the Medium Zip 250 in black. The neck zips high and length is perfect. Ordering more!
A**R
Super warm and comfy
Super warm and comfortable. I wore these during a trip to northern Finland and had no issues! No sweating, no bunching , nothing, Definitely need another pair to rotate out for longer trips!
R**A
Thermal underwear review
Wore them while still hunting seems to be just ok. I still wore a heated vest over them. They are soft, comfortable and made well.
R**.
Merino wool thermals
Best purchase when it's -8° out
M**I
Caldo e confortevole ma non troppo resistente
Dopo circa 5 utilizzi intensi si è formato un piccolo buco nei pantaloni e si sono formati piccoli grumi di fibre sulla superficie. A prescindere da questo l'intimo termico acquistato (250 g/sm) riesce a mantenere calore anche in giornate molto fredde. Ha retto giornate di sci con clima a -15° con sopra solo pile e guscio (giacca e sovrapantalone in gore-tex a 3 strati senza imbottitura). Comunque un ottimo prodotto qualità / prezzo.
M**O
Passt
Wer etwas warmes sucht,genau richtig
J**Z
100x100 aconsejable
Muy bien embalado y 100x100 lana merino lo cual me ha impresionado...muy suave al tacto .falta probarlo con la moto ahora en invierno. iré comentando
Y**A
Essential for -15 and lower temperatuers.
bought 350 M. Excellent quality. Soft snug feeling. kept me warm during -25 C in Toronto. plus bonus pair of socks makes it complete set. I am pretty satisfied with the quality of the product.
O**R
Vraiment bien! Très agréable
Très agréable à porter, tient chaud sans avoir de sensation de sur épaisseur, ne sent pas la transpiration même après plusieurs jours. Taille un peu grand peut être.
Trustpilot
3 weeks ago
1 month ago