Men's Base Layer Heavyweight LS 1/2 Zip
Men's Baselayer Heavyweight Long Sleeve 1/2 Zip
$79.99
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Mens OH Baselayer Heavyweight L/S Half Zip
What’s next to your skin sets the stage for your comfort: don’t mess around. Developed with top physiologists, Columbia’s new heavyweight baselayers offer our highest warmth-to-weight ratio for optimal comfort in extreme winter conditions.  more less
 
Style#: AM6943
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Our technology, at work for you

Omni-Heat-Reflective

Omni-Heat® Thermal Reflective – Keep Your Warmth, Not Your Sweat
This technology helps regulate body temperature by reflecting and retaining the warmth you generate, while dissipating moisture and excess heat.

Learn More ››

Omni Wick

Omni-Wick® - Advanced Evaporation
Moisture transferring technology that moves and disperses sweat away from the body for quick evaporation, keeping you comfortable during physical activity.

Learn More ››

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ColumbiaMen's Baselayer Heavyweight Long Sleeve 1/2 Zip
Overall Rating 
4.7 / 5
4.7 / 5
(9)
Open Ratings Snapshot
Rating breakdown 9 reviews
5 Stars
6
4 Stars
3
3 Stars
0
2 Stars
0
1 Star
0
Fit: 
Too Small
3.7 / 7
True to Size
Too Large
Quality
How would you grade this itemʼs materials, construction and workmanship?
 
5 / 5
5 / 5
Function
How well this item performed in its intended use, and beyond.
 
4.8 / 5
4.8 / 5
9 out of 9(100%)customers recommend this product.
9
9 What’s next to your skin sets the stage for your comfort: don’t mess around. Developed with top physiologists, Columbia’s new heavyweight baselayers offer our highest warmth-to-weight ratio for optimal comfort in extreme winter conditions.
Overall Rating 
4.7 / 5
4.7 / 5
(9)
Open Ratings Snapshot
Rating breakdown 9 reviews
5 Stars
6
4 Stars
3
3 Stars
0
2 Stars
0
1 Star
0
Fit: 
Too Small
3.7 / 7
True to Size
Too Large
Quality
How would you grade this itemʼs materials, construction and workmanship?
 
5 / 5
5 / 5
Function
How well this item performed in its intended use, and beyond.
 
4.8 / 5
4.8 / 5
9 out of 9(100%)customers recommend this product.
Product Reviews Summary
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Ratings summary
Overall Rating 
4.7 / 5
4.7 / 5
(9)
Open Ratings Snapshot
Rating breakdown 9 reviews
5 Stars
6
4 Stars
3
3 Stars
0
2 Stars
0
1 Star
0
Fit: 
Too Small
3.7 / 7
True to Size
Too Large
Quality
How would you grade this itemʼs materials, construction and workmanship?
 
5 / 5
5 / 5
Function
How well this item performed in its intended use, and beyond.
 
4.8 / 5
4.8 / 5
9 out of 9(100%)customers recommend this product.
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Product ReviewsWrite a review
Overall Rating 
5 / 5
5 / 5
excellent addition
PostedDecember 17, 2011
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novajerry
 
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Location: oregon
Outdoor Experience: Occasional Explorer (outdoors 0-19 days a year)
Employee: No
Fit: 
Too Small
True to Size
True to Size
Too Large
Quality
How would you grade this itemʼs materials, construction and workmanship?
 
5 / 5
5 / 5
Function
How well this item performed in its intended use, and beyond.
 
5 / 5
5 / 5
I had bought a omni-heat jacket last year and was amazed at the light weight and warmth it provided,and then this comes along and takes the game up too a whole different level.The light weight and comfort that this product provides is second to none.I have been a customer for several years and just when you think,how can they possibly top that,they do.This is an excellent addition to your outdoor adventures.
Activities: Hiking/Trekking, Mountain Biking
Conditions: Snowy, Freezing
I would recommend this product.
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Overall Rating 
4 / 5
4 / 5
Good baselayer
PostedDecember 13, 2011
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Genthar
 
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Location: Escondido, CA
Outdoor Experience: Occasional Explorer (outdoors 0-19 days a year)
Employee: No
Fit: 
Too Small
Fits Slightly Small
True to Size
Too Large
Quality
How would you grade this itemʼs materials, construction and workmanship?
 
5 / 5
5 / 5
Function
How well this item performed in its intended use, and beyond.
 
4 / 5
4 / 5
Runs a little cool, but the overall thermal regulation is better than the other base-layers I've tried. The fabric breathes well which is why it seems to run a little cool, but overall I stayed very comfortable in a wide range of temperatures. The thumb-hole sleeves are nice for a little extra warmth around the wrist/hand area. Was a little small, but because the fabric stretches well, it was not uncomfortable.
Activities: Hiking/Trekking
Conditions: Snowy, Windy, Freezing
I would recommend this product.
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Overall Rating 
5 / 5
5 / 5
Cold weather shirt
PostedDecember 8, 2011
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DizzynDenver
 
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Location: Colorado
Outdoor Experience: Professional Thrill Seeker (outdoors 53+ days a year)
Employee: No
Quality
How would you grade this itemʼs materials, construction and workmanship?
 
5 / 5
5 / 5
Function
How well this item performed in its intended use, and beyond.
 
5 / 5
5 / 5
I wear this under my columbia Jacket while I'm snowshoeing and everytime I work up a sweat with this on. Great product and the omni heat is killer.
Activities: Snowshoeing
I would recommend this product.
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Overall Rating 
5 / 5
5 / 5
COLD DAY FISHING
PostedDecember 7, 2011
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highsierra
 
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Location: Reno nevada
Outdoor Experience: Everyday Adventurer (outdoors 20-52 days a year)
Employee: No
Fit: 
Too Small
True to Size
True to Size
Too Large
Quality
How would you grade this itemʼs materials, construction and workmanship?
 
5 / 5
5 / 5
Function
How well this item performed in its intended use, and beyond.
 
5 / 5
5 / 5
A very nice baselayer. It is so comfortable to wear, I can't believe it. Soft to the skin, not overly tight, and very warm . A quality piece of merchandise. Perfect for fishing in double digit weather.
Activities: Boating, Fishing - Freshwater
Conditions: Freezing
I would recommend this product.
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Overall Rating 
4 / 5
4 / 5
size
PostedNovember 17, 2011
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billh5
 
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Location: Bloomington, Illinois
The baselayer shirt is too tight, altho that is the size I wear in all my shirts.
I would recommend this product.
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Overall Rating 
5 / 5
5 / 5
Very Impressed
PostedNovember 14, 2011
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ksquared
 
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Just used this shirt forthe first time on a 3 day winter mountaineering trip in CO. Temps ranging from 25F to sub zero. Never took the top off and stayed comfortable and dry the entire time. I was surprised at how balanced I felt, and the lack of sweating reduced the stink factor nomally experienced with synthetic base layers.
I would recommend this product.
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Overall Rating 
4 / 5
4 / 5
Baselayer Omni-heat
PostedNovember 8, 2011
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Cowpuncher
 
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Location: Montana
Bought and used hunting in 20 degree weather. I really like the way they feel, the fit,and the construction. Being honest, I am not sure if the omni-heat makes a difference while sitting for long periods. I love them as a baselayer but will wear merinos overtop to give me that added warmth while sitting long periods. They are a great addition to my hunting apparel.
I would recommend this product.
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Overall Rating 
5 / 5
5 / 5
The best!
PostedNovember 5, 2011
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Nick79
 
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Location: New England
Very warm and comfortable! Excellent for cold weather in New England!
I would recommend this product.
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Overall Rating 
5 / 5
5 / 5
Amazing New Baselayer
PostedAugust 27, 2011
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driftwood
 
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Columbia baselayer, where have you been all my life? This is the best baselayer i've owned. The fit is body hugging, so if you want loose, buy a size up. The arms are just right enough for my long arms. So stoked, i'm buying more in different weights and styles!
I would recommend this product.
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