100% Merino Wool Sentinel Men's S/S Crew - Midweight
Minus33 Merino Wool Clothing Sentinel Men's Midweight Wool S/S Crew
Midweight - Sentinel Men's S/S Crew 100% Merino Wool - Minus33 Merino Wool Clothing
100% Merino Wool Sentinel Men's S/S Crew - Midweight
100% Merino Wool Sentinel Men's S/S Crew - Midweight
Minus33 Merino Wool Clothing Sentinel Men's Midweight Wool S/S Crew
Midweight - Sentinel Men's S/S Crew 100% Merino Wool

Midweight Sentinel Men's S/S Crew 100% Merino Wool

Regular price $75.99 Sale price$59.99 Save $16.00
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.

Shop Men's Clothing Shop Men's Big and Tall Clothing

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 8 reviews
These work.

So I work half my day outside. These, hands down, are the best mid weight wool undershirts money can buy. Name the brand I’ve owned it. These get the job done. Can wear two days with no stink. Breathe superbly. Hold up in the wash like a champ. Yes, the sleeves are long. Which is great as I have long arms. In short, these are an actual tool. Part of my work uniform. I depend on base layer warmth. Made like work clothes used to be made. Worth every single dollar I paid for them. If you work outside, and need to keep your core warm, layer up and have these on. Thank you for making dependable work gear. I appreciate it immensely.


We are super pleased to hear that you are happy and comfortable with your Sentinel Men's Crew. Thanks for the great review!

-Melinda W.

Jean Tuller
nice t; but what's up with the sleeves?

This is a well-made mid-weight t-shirt, perfect for throwing under a jacket or flannel shirt. Right combo of stretch and softness. Only complaint is the sleeves, which, for a t-shirt, are long and weirdly flappy. Given that this shirt has stretch, the over-sized sleeve is a mystery.

Thank you for taking the time to leave a review.

Timothy Mayhew
My favorite go-to tee!!

I have been wearing the Minus 33 mid-weight merino wool tee shirt for many years now. It is warm, handles moisture well and is my first layer for the three cooler seasons of the year. In fact, I just purchased three more. My only regret is than it only comes in black. Please, please, please offer this tee in other colors so my wife and friends will stop accusing me of wearing the same shirt everyday.

Seriously, more colors please!


We are glad to hear you are happy with your 100% Merino Wool Sentinel Men's S/S Crew - Midweight. We will pass your color suggestion along to our product development team.

Thank you for taking the time to leave a review!

-Jeannie T.

Charles Meneses
Awesome t-shirt

I have no complaints, they're great for lounging around the house, for walking outside, for staying warm in cold weather, and even doninating sweat in warmer weather.

Just get a good wool cleaner for when it does get dirty and dry laying down.


Thanks for the great review! We are glad that you are happy with your Minus33 T-Shirt. We are also thrilled to see that you enjoy wearing your T-Shirt for different types of activities and temperatures.

-Melinda W.

Lucinda Pyne
Great gift!

Xmas present for my Maine Guide hubby. Loves this weight. Great base layer and also under flannel shirts for casual wear. Love it!


Thank you for leaving us a great review on the 100% Merino Wool Midweight Sentinel Men's Short Sleeve Shirt. We are pleased to hear that he is enjoying the fit and weight of this garment! Thank you for choosing Minus33!


-Steven D

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