Midweight - Isolation Men's 1/4 Zip 100% Merino Wool
Midweight - Isolation Men's 1/4 Zip 100% Merino Wool
Midweight - Isolation Men's 1/4 Zip 100% Merino Wool
Midweight - Isolation Men's 1/4 Zip 100% Merino Wool
Midweight - Isolation Men's 1/4 Zip 100% Merino Wool
Midweight - Isolation Men's 1/4 Zip 100% Merino Wool
Midweight - Isolation Men's 1/4 Zip 100% Merino Wool
Minus33 Merino Wool Clothing Isolation Men's Midweight Wool 1/4 Zip
Minus33 Merino Wool Clothing Isolation Men's Midweight Wool 1/4 Zip
Minus33 Merino Wool Clothing Isolation Men's Midweight Wool 1/4 Zip
Minus33 Merino Wool Clothing Isolation Men's Midweight Wool 1/4 Zip
Minus33 Merino Wool Clothing Isolation Men's Midweight Wool 1/4 Zip
Minus33 Merino Wool Clothing Isolation Men's Midweight Wool 1/4 Zip
Minus33 Merino Wool Clothing Isolation Men's Midweight Wool 1/4 Zip
100% Merino Wool Isolation Men's 1/4 Zip - Midweight
100% Merino Wool Isolation Men's 1/4 Zip - Midweight
100% Merino Wool Isolation Men's 1/4 Zip - Midweight
100% Merino Wool Isolation Men's 1/4 Zip - Midweight
100% Merino Wool Isolation Men's 1/4 Zip - Midweight
Minus33 Merino Wool Clothing Isolation Men's Midweight Wool 1/4 Zip
Minus33 Merino Wool Clothing Isolation Men's Midweight Wool 1/4 Zip
Minus33 Merino Wool Clothing Isolation Men's Midweight Wool 1/4 Zip
Minus33 Merino Wool Clothing Isolation Men's Midweight Wool 1/4 Zip
Minus33 Merino Wool Clothing Isolation Men's Midweight Wool 1/4 Zip
Minus33 Merino Wool Clothing Isolation Men's Midweight Wool 1/4 Zip
Minus33 Merino Wool Clothing Isolation Men's Midweight Wool 1/4 Zip
Minus33 Merino Wool Clothing Isolation Men's Midweight Wool 1/4 Zip
Minus33 Merino Wool Clothing Isolation Men's Midweight Wool 1/4 Zip
Minus33 Merino Wool Clothing Isolation Men's Midweight Wool 1/4 Zip
Minus33 Merino Wool Clothing Isolation Men's Midweight Wool 1/4 Zip
Minus33 Merino Wool Clothing Isolation Men's Midweight Wool 1/4 Zip
Minus33 Merino Wool Clothing Isolation Men's Midweight Wool 1/4 Zip
Minus33 Merino Wool Clothing Isolation Men's Midweight Wool 1/4 Zip
Minus33 Merino Wool Clothing Isolation Men's Midweight Wool 1/4 Zip
Minus33 Merino Wool Clothing Isolation Men's Midweight Wool 1/4 Zip
100% Merino Wool Isolation Men's 1/4 Zip - Midweight
Minus33 Merino Wool Clothing Isolation Men's Midweight Wool 1/4 Zip
Minus33 Merino Wool Clothing Isolation Men's Midweight Wool 1/4 Zip
Minus33 Merino Wool Clothing Isolation Men's Midweight Wool 1/4 Zip
Midweight - Isolation Men's 1/4 Zip 100% Merino Wool
Midweight - Isolation Men's 1/4 Zip 100% Merino Wool
Midweight - Isolation Men's 1/4 Zip 100% Merino Wool
Midweight - Isolation Men's 1/4 Zip 100% Merino Wool
Midweight - Isolation Men's 1/4 Zip 100% Merino Wool

Midweight
Isolation Men's 1/4 Zip

100% Merino Wool

Regular price$99.99
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Shipping calculated at checkout.
Color
Size
Size chart

Measurements

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

Midweight
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 (Woolverino 85% Merino Wool)
UPF Rating 50+

Compare Weights

RECOMMENDED FOR

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

Anti-Microbial

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

Renewable

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

MACHINE WASH AND DRY

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 92 reviews
92%
(85)
4%
(4)
2%
(2)
1%
(1)
0%
(0)
A
AJ robiou
Happy Fat Boy

I’m 6’3” 300 lbs just got my 1/4 zip base layer in today. Fits great, you can feel it’s a quality garment Yes it is expensive but seems worth it. At this price point I wish it was not made in china. Thank you for making fat boy sizes 😊

AJ,

Thank you for giving us your initial feedback on your Isolation Men's 1/4 Zip. We are happy to hear that you are enjoying the quality of the garment so far. Additionally, we are happy to offer all inclusive sizing! We want people of all shapes and sizes to enjoy the wonders of merino wool and be able to keep warm when enjoying the outdoors!

Best,

-Steven D

I
Ieie
Norway worthy

Hello we bought these in the male and female version for a trip to Northern Norway. We did have spectacular weather but the temps were 40 and wind blowing on the North Cape. We were never cold with this and a wind breaker. Love they are easy to wash!

Leie,

Thank you for your feedback! It's great to hear that your midweight 1/4 zips performed well and kept you both warm on your trip to Northern Norway!

Thank you for taking the time to leave us a great review.

Best,

-Steven D

K
Keith Murray
Overall minus 33 review

Minus 33 products are the very best in the market.

My minus 33 addiction started with socks that didn t make my feet sweat and then cold. I have tried every , and i mean every,sock, sock liner, powder, even tried antiperspirant on my feet. Merino wool was my answer.

Then I tried a 1/4 zip top and my polypropylene stuff got shoved to the back of the closet.

I tried medium weight bottoms and I was just so comfortable and perfectly warm.

Of course there is a trial period to zero in on your sizing, but minus 33 customer service is second to none.

For those of you who live in n.h., they also have, business hours, back door pick up service. Several times I ve driven to the mountains, and just exited the highway for about 8 mins, picked up my order, and i was back on my way.

Now I have progressed to mid and expedition pieces which really helps to fine tune for the forecast.

If I lost any of my pieces I would purchase them all over again without hesitation. I never have to consider any other manufacturer, there is no better comfort or warmth.

Can t say enough about minus 33, you won t go wrong, and they didn t give me free merchandise to make me say all this. Simply the best.

Thanks minus 33

Keith,

Thank you for the great review! We are happy to hear you are a fan of our Minus33 products!

-Jeannie T.

R
Randy H
Works well for a mid-layer

I bought the Isolation Men's 1/4 Zip Midweight Black LT to layer over my Woolverino Men's Micro Weight L T-Shirt. I just got back from doing some short hikes in the Joshua Tree NP and these two layers worked well for temps in the 60s. Adding a 200 weight fleece on top was fine into the 50s. If it's colder and/or if the wind kicks up, you may want a windbreak from a rain jacket or down puffy coat.
I'm 6'2", 175 lbs and the Large size fits well. I've got long arms (36"/37" dress shirt sleeves) so the TALL size was perfect for the Isolation 1/4 zip.
I wore the Woolverino T-Shirt on the Appalachian Trail in 2021 for 1100 miles and it is a great shirt for hot weather. Day after day, completely soaked with sweat and it just didn't stink like the other hikers wearing polyester.

Randy,

It is great to hear that our 100% Merino Wool Isolation Men's 1/4 Zip - Midweight, worked well through your hiking trips in the Joshua Tree. Hiking in the Joshua Tree is great and a lot fun to take pictures of!

Happy Hiking!

-Jeannie T.

J
Jeremy Almarode
Absolutely Outstanding Product!

When temperatures drop, selection of outdoor clothing becomes essential to comfort and safety. I am extremely impressed with this garment! The size runs true and provides for a great fit. It is soft to the touch, comfortable against bare skin... just an awesome base layer option. Its warmth also makes it a great insulating layer. The combination of a long sleeve moisture wicking shirt, followed by my merino wool 1/4 zip and a soft shell jacket have kept me comfortable down into the mid 20's. The quality and construction of this garment is first class and its warmth to weight ratio can't be beat. As an avid mountaineer and a certified K9 Search and Rescue handler, this garment and my MINUS 33 Beanie have earned a permanent place in my pack!

Jeremy,

Thank you for taking the time to leave us a fantastic, detailed review! We are happy to hear that you are impressed with the fit and performance of your Minus33 Men's Midweight Isolation 1/4 zip! This is a personal favorite garment of mine and I couldn't agree with you more that this piece is perfect as a base layer or an insulating layer. Thanks again for leaving us your feedback, it is greatly appreciated.

Best,

-Steven D