Midweight - Men's Long Sleeve Button Up 100% Merino Wool
Midweight - Men's Long Sleeve Button Up 100% Merino Wool
Midweight - Men's Long Sleeve Button Up 100% Merino Wool - Minus33 Merino Wool Clothing
Midweight - Men's Long Sleeve Button Up 100% Merino Wool
Midweight - Men's Long Sleeve Button Up 100% Merino Wool
Midweight - Men's Long Sleeve Button Up 100% Merino Wool - Minus33 Merino Wool Clothing
Midweight - Men's Long Sleeve Button Up 100% Merino Wool - Minus33 Merino Wool Clothing
Midweight - Men's Long Sleeve Button Up 100% Merino Wool - Minus33 Merino Wool Clothing

Midweight Men's Long Sleeve Button Up 100% Merino Wool

Regular price$119.99
Shipping calculated at checkout.
Size chart


Please note, measurements refer to body size, not garment dimensions, unless otherwise noted. Measurements are in inches.

Men's Clothing Size Chart

Size Chest (in) Waist (in) Sleeve Length (in) Shirt Length (in) Inseam (in)
XS 33-35 24-27 30-31 25.5-26.5 25-27
S 35-38 28-30 31-32 26.5-27.5 28-30
M 39-41 31-33 32-33 27.5-28.5 29-32
L 42-45 34-36 33-34 28.5-29.5 32-34
XL 46-48 37-40 34-35 29.5-30.5 32-35
XXL 49-52 41-44 35-36 30.5-31.5 34-35
XXXL 52-54 45-49 36-37 31.5-32.5 34-36

Men's Big and Tall Clothing Size Chart

Size Chest (in) Waist (in) Sleeve Length (in) Shirt Length (in) Inseam (in)
MT 39-41 31-33 35-36 30.5-31.5 32-34
LT 42-45 34-36 36-37 31.5-32.5 33-36
XLT 46-48 37-40 37-38 32.5-33.5 33-36
2XT 49-52 41-44 38-39 33.5-34.5 34-36
3XT 52-54 45-49 39-40 34.5-35.5 35-37
4X 54-57 49-52 36-37 32.5-33.5 34-36
4XT 54-57 49-52 40-41 35.5-36.5 35-37
5X 57-59 52-54 36-37 33.5-34.5 34-36
6X 59-61 54-56 37-38 34.5-35.5 34-36

How to Measure

Chest: Measure the circumference around the fullest part of your chest, underneath the arms.

Waist: Measure the circumference around the natural waist, near the belly button.

Sleeve: Measure from your center back neck, to the elbow, to the wrist.

Shirt Length: This measurement refers to the approximate size of the shirt back length, from the neck to the bottom hem.

Inseam: Measure from the center of the crotch to the end of the ankle.

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Fit Types

Athletic Fit

Regular Fit

Relaxed Fit

Athletic Fit Regular Fit Relaxed Fit

Fits best as: Base Layer

Skin tight, slim, compression style fit. Wear this layer first and add on top of it if needed.

Fits best as: Base Layer, Mid Layer

True to size, standard fit with a little bit of room to breathe, but not too baggy. Perfect on its own or with a t-shirt or thin shirt underneath.

Fits best as: Mid Layer, Insulating Layer, Outer Layer

A little more room than you would find in a Regular fit. Enough space to fit 1-2 layers underneath.

Fit FAQs

What if I am between sizes?

If you are between sizes, we recommend sizing up or down based on what fit type you would prefer, and based on how you plan to wear the piece. Our knitted merino is stretchy and you could realistically go with either size. If you would prefer an Athletic fit, size down. If you prefer a Regular or Relaxed fit, size up.

Do I need to size up/down to layer?

Generally, no, you do not need to purchase a different size than normal. Our base layers are designed to fit right into your current layering system. They are also designed to work with other products in our line, too. You may wish to adjust your sizing if you plan to wear one of our garments in a way that it is not intended, if that's the case please feel free to contact our customer service team for help.

Does your clothing run true to size?

Yes, our clothing runs true to size and is sized similar to most other American brands. If a sizing discrepancy is discovered, you will see fit advice in that product's specific listing.

Not sure what size or fit type you need?

Learn more about layering systems and how they can help you choose. Still need help? Contact our customer service team for personalized advice.

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Our Guarantee
man wearing midweight crew long sleeve shirt man night hiking wearing midweight merino wool quarter zip

Merino Wool

Versatile and comfortable, our Merino Wool will always have your back. Designed as a three-season garment, our Midweight works great as either a base or mid layer.

Midweight Details

Our Midweight styles have all the same natural qualities as our Lightweight Merino Wool, with greater insulation. Minus33 Merino Wool Clothing is perfect as a base layer for a day on the slopes or as an emergency pullover when a cold front rolls in just before you summit.

235 g/m2

Interlock Knit

18.5 Micron

100% Merino Wool
UPF Rating 50+

Compare Weights


Activities: Hiking, Camping, Lifestyle, Snowsports, Hunting, Fishing.

Seasons: Spring, Fall, Winter.

High Activity Temperatures: 0°F to 30°F

Low Activity Temperatures: 30°F to 60°F

Learn about Layering

why merino wool

two people sitting next to a river wearing merino wool

Moisture Wicking

Minus33 Merino Wool regulates the amount of moisture on your skin by absorbing any moisture or sweat on your body. Then, the absorbed moisture evaporates out of the fabric into the atmosphere.

merino wool tshirt drying in the sun


Merino Wool fibers naturally reject any bacteria in moisture or sweat as it is wicked away, so foot fungus and smelly odor will not be a problem while wearing our products.

woman hiking with her dog crossing a river

Insulates When Wet

Wool will absorb up to 30% of its weight in moisture without feeling wet or clammy. If you do get wet, wool will insulate you better than cotton or polyester materials.

first responder at a fire

Fire Resistant

Merino Wool insulates against high temperatures and does not readily catch fire. If it does, it self-extinguishes. When Merino burns, it doesn’t melt and stick to the skin like synthetic fabrics do.

woman doing yoga on top of a mountain in merino wool base layers

UV Protection

Don’t worry about sunburn on a sunny day summiting a peak. Lightweight layers have a UPF rating of 25. Midweight and Expedition have a UPF rating of 50+.

Australian merino wool sheep


Merino Wool has a low environmental footprint and naturally returns to the elements. Shear a merino sheep in the morning, and in the afternoon they’re happily nibbling their way towards renewing next season’s clip. 



Total Easy Care (TEC) Merino apparel is designed for today's busy lifestyle. Total Easy Care Merino garments are all machine-washable, and are suitable for tumble drying.

Even after frequent laundering they retain an 'as new' appearance. They won't shrink, lose their shape, fade or color-bleed. They remain soft and comfortable for the life of the garment.

Customer Reviews

Based on 6 reviews
Michael Hanna
Love this shirt!

Please make it in more colors

Hi Michael,

It's great to hear that you are enjoying your Minus33 Men's Midweight Long Sleeve Button Up. I will pass along your suggestion for more colors in this item to our design team. Thank you for taking the time to leave us a great review!


-Steven D

Fly Navy
Close to perfect!

A recent fall weekend trip to Chicago started an idea to find a wool shirt that is good looking and comfortable. I wear a 16 1/2” x 34” shirt and the L size is nearly ideal. The sleeves were almost 3” too long. So much that I had a tailor alter them for another $2:-( This shirt lacks structure, that is, it hangs like a t-shirt. So, it’s informal rather than “business attire.” The material is lovely - and soft. Delightful that it can be washed. And, I have not noticed any shrinking. Thank you, Minus 33, for the medium weight and all-merino. At the same time, I purchased a similar SmrtWl shirt and it is a light weight and significant % synthetic. I much prefer this M-33.

Thank you for taking the time to leave us a review. Given that we are a small company it is great to hear feedback from our customers. We will make sure that our Product Development team gets the information about the sleeve length and how the piece drapes!
-Minus 33

Robbie Rudder
Excellent Button Up Shirt

This shirt can be worn either casually with jeans, slacks, or athleisure joggers. It can be equally paired with a blazer or sport coat for a business casual or smart casual look. It looks great untucked but could be tucked appropriately. Regardless of the style it’s incredibly soft and comfortable. I’m 5’9”, weigh 165, 38” chest and 33.5” natural waist line. I bought a medium and couldn’t be happier with the fit. Minus33, if you’re reading this, please make this shirt in additional colors.


Glad to hear that you are enjoying the style of our Men's Long Sleeve Button Up - Midweight, and how soft and comfortable it is.

Thank you for taking the time to leave a review!

-Jeannie T.

Veronica Nagle
Great shirt

I bought this as a Christmas gift for my husband.We already love the feel of the fabric from Minus 33, and the simple laundry care. This, being shaped like a dress shirt, can be worn to look dressed up, but if he needs to walk in the woods, he knows he has an automatic base layer!
If I were to make one suggestion, it would be to have it sized like a dress shirt, with neck and sleeve length.
In any case, a great product. I look forward to it being made in grey!


Great to hear your husband loves the feel of our Men's Long Sleeve Button Up - Midweight
It is definitely a sharp looking shirt!

Thank you for taking the time to leave a review!

-Jeannie T.

Samuel Trudel
buy this shirt

This mid weight button up merino shirt is pretty perfect. I wanted a classy black button up collar wool shirt for my upcoming trip to Paris in March where it will still be chilly. I needed a stylish and warm urban sophisticated shirt and this is it!


Thank you for taking the time to leave a review for our Midweight - Men's Long Sleeve Button Up 100% Merino Wool shirt. We're so happy to hear that you found it to be perfect for your upcoming trip to Paris. Our goal is to provide stylish and warm options for our customers, and we're glad this shirt met your needs. Enjoy your trip and stay warm!

Jeannie T.

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