Expedition - Men's Mock Neck 100% Merino Wool
Expedition - Men's Mock Neck 100% Merino Wool
Expedition - Men's Mock Neck 100% Merino Wool
Expedition - Men's Mock Neck 100% Merino Wool - Minus33 Merino Wool Clothing
Expedition - Men's Mock Neck 100% Merino Wool

Expedition Men's Mock Neck 100% Merino Wool

Regular price$149.99
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 sipping up his expedition weight 1/4 zip man sitting down wearing expedition weight bottoms


On the coldest, darkest nights, you will discover yourself seeking the warmth of Minus33 Merino Wool. Our Expedition products are suitable for the coldest climates and true expeditions.

Expedition Details

Originally designed for winter mountaineering on Mount Washington, Minus33 Expedition Weight clothing has seen action in both the Antarctic and Arctic, and even to the Summit of Mount Everest. Anyone venturing out in the cold will greet our Expedition clothing with a warm welcome as either a base, mid or outer layer. When you need to keep the ever-present cold from seeping in, our Expedition items will be your best friend.

400 g/m2

Interlock Knit

18.5 Micron

100% Merino Wool
UPF Rating 50+

Compare Weights


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

Seasons: Fall, Winter

High Activity Temperatures: 0°F and below

Low Activity Temperatures: 30°F to 0°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 7 reviews
Needs more of a true mock neck

This is fine overall and unique in that no one else offers something this thick, but I wish the neck was higher. (It made me realize how low the neck is on the standard crew necks.) I maybe have an unusually long neck, but my t-shirts come up higher than the neckline of these shirts (and so, annoyingly, can be seen.)

Thank you for taking the time to leave us a review. The Men's Mock Neck - Expedition is a new piece. Thank you for your feedback.
-Katie P.

Ralf Wease

I have been in line work since the 80s worked in some cold states. Right now in my life I have to say this clothing is the BEST by far base layer I have ever owned. My feet was always cold in the fall till summer but since I have a pair for every day of the week of minus 33 calves socks my feet have never been cold at all and we just went through some -9 degree temperatures not including the windchill and my feet have NEVER been warmer even 100ft. In the air in a crane basket you lineman understand what I am saying. Will continue to purchase from this company very expedient on getting the order to you. Thank you minus 33!!!!!!!!!!!!!!!!

Thank you for braving the cold to keep power on for the rest of us. Keep up the great work and stay warm!
-Katie P.

Duncan Lockie
Another arrow to my quiver, a string to my bow...

I must now have 30 or more Minus33 pieces in my closet ranging from lightweight, short-sleeved undershirts through to expedition-weight hoodies and long johns. I love them all and almost exclusively wear merino as my first layer and more often than not my second and third layer up here during our freezing Northeast winters! In the summer they act as moisture-wicking, body-odor-resistant undergarments. They've held up extremely well to washing and drying and I love them all! My new expedition-weight, long-sleeved, mock-neck gives me a little extra neck coverage around my neck and I love it too. Thank you, Minus33, you're doing a great job!


Thank you for leaving us a fantastic review and for being a loyal customer. It's the customers like yourself that make us great! We are pleased to hear that you have so many of our garments for all seasons! Furthermore, that they have all held up over time. We design our garments to be able to be conveniently washed for our customers busy lifestyles. Also, It's great to hear that you are enjoying the newest edition to our expedition collection: the 100% Merino Wool Expedition Men's Mock Neck! It is perfect for when you're looking for that extra bit of coverage. Thanks again!

Stay warm,

-Steven D


Superlative feel, design, fit, and warmth. I'm 6' 175 and the large fits perfect.


We are thrilled to hear that you are enjoying our Expedition Men's Mock Neck 100% Merino Wool! Thank you for taking the time to leave such a positive review. We are happy to hear that the feel, design, fit, and warmth of our product have met your expectations. Your satisfaction is our top priority. Thank you for choosing our brand and we hope to continue providing you with high-quality products in the future.


-Steven D

Expedition - Men's Mock Neck 100% Merino Wool

Excellent Mock Neck
Excellent fit
Excellent warmth
Hopefully more colors available in the future

We love a good checklist at Minus33 and we are happy to know that we are checking most of your boxes. We love getting feedback from our customers so, we will let our product development team know you want to see colors!
Stay warm!

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