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Omni-Heat™ Baselayer packs heat conservation into thin wicking layers to maintain dry warmth.
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Ergonomic design lines contour the body, while flat lock stitching and a streamlined fit enhance comfort and eliminate chafing edges, offering the perfect solution to any outdoor conditions you’re up against.

Heat Reflection

Our Omni-Heat™ Thermal Reflective silver dot lining, our innovative layers reflect your own body heat, so you can retain your body heat naturally.

Moisture Wicking

To ensure that you stay fresh and dry, we’ve incorporated Omni-Wick™ technology, which whisks moisture away from your body.

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Men's Baselayer Heavyweight Tight with Fly
$65.00
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Omni-Heat Reflective Baselayer
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 #AM8109
Color:  
Size:
XS
S
M
L
XL
XXL
Inseam:
Regular

Price: 
$65.00
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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
Omni-Wick pulls moisture away from the body and enables perspiration to evaporate quickly, keeping you dry and comfortable.

Learn More ››

Men's Baselayer Heavyweight Tight with Fly 4.9 5 20 20
Ski Patroller Ive been on patrol for 14 seasons, best base layer Ive ever used! April 2, 2012
warm w/o weight Both the top and the tights are very warm w/o any bulkiness. Fabric is not itchy and it does keep me dry. I am a cattle rancher and feed by hand in all kinds of weather conditions. These keep me comfortable. I like the zip neck. my wife is flower63-not me! March 27, 2012
this product does the job i have had the baselayer for a few months, now i feel i can give a good review. they have a great fit and light weight, i have gone out hunting many timed with temps in the low 20's with wind chills in the teens and stayed warmer than i would have with my regular thermals. if you do any kind of activity all i can say is wow you wont need much else. February 5, 2012
Duck Hunting The Baselayer kept me very warm on several duck hunting trips. I was almost too warm. I am very satisfied with the baselayer, and have recommended it to several people. February 4, 2012
The Emperor's New Clothes Feel I have a variety of underlayers of varying weights and product lines. It has always seemed items like these are just good for thermal protection but not always super comfortable. They either fit loose and baggy or tight enough to notice their presense. Not this baselayer. These babies feel like you have nothing on at all! No restrictions. No binding, tightness or bagginess. In addition to this, they are labeled Heavyweight, yet their fabric is as light and thin as a typical lightweight. They've applied their advanced OMNI-HEAT Thermal Reflective feature (inner-surface metalic circular pattern) to the inside of the material. This reflects your own body heat back on itself, increasing warmth by 20%. It also is slick for easier dressing and super comfort. My body temp burns hot and I do not like feeling restrictions of clothing----these are the Bomb!!! February 4, 2012
Good Base Layer Work good so far. I haven't tried them in really cold yet. February 3, 2012
Warmest Baselayer Pants These are by far the best baselayer pants I have ever had. I own some other baselayer pants and these are easily the warmest and most comfortable. They do fit slightly large but I actually appreciate the fit. They aren't super tight to the point I have trouble putting them on but they aren't too big. They are just right. I would say when getting a size if you normally wear small or medium or whatnot, get your normal size. Summary: buy these pants. January 30, 2012
Thin, lightweight and effective This is actually my second pair. I was so impressed by the first pair I bought, I got a spare pair. I like the fact they're thin and comfortable. This helps when having to wear them under lighter weight business casual slacks, which is my primary use. January 11, 2012
Terrific Long Underwear Bottoms! These are great base layer bottoms, worth the price! Very comfortable, fit great, just the right thickness for cold, damp winter wade fishing here in Texas. And they are multi use: you can dress up for Romeo & Juliet sword fights, complete with cod piece. Turn them inside out to expose the silver dots and you can do Michael Jackson dance routines! January 5, 2012
Baselayer tight I bought this for my son along with the top for Christmas and he absolutely loves them, they are exactly what he needed for his job and he said they keep him really warm. January 3, 2012
Haven't used yet but seem great Comfortable and should keep me warm on ski trip next month worn under Columbia ski pants with Omni Shield. December 26, 2011
Excellent baselayer The fit is excellent for a base-layer, and they are very comfortable over a wide temperature range. The fly is just a little awkward as the panels are fairly wide, but it's far better than not having a fly. December 13, 2011
Perfect with my Headwall pants I wear these snowshoeing and they're fantastic. I also wear them hunting or anytime I want to stay warm. watching outdoor football in late fall, oh yeah.. December 8, 2011
Great Product These fit great and will keep you warm in any cold weather condition. December 7, 2011
Hot Pants Now that I have this pant I'm totally hot. November 30, 2011
Awesome pants just wore these pants on a 3 day mountaineering trip in CO and I was thoroughly impressed. Temps ranging from 25F to sub zero with wind chill, I was only wearing these base layers and a thin softshell pant. To my surprise, I never needed to add my shell pant, even above 14,000Ft in sub-zero wind chill. On the flip side, i did not overheat on the approach in or hike out in temps of low 30's. versatile and exceptional comfort. November 14, 2011
Running pant After one to many runs in the rain I finally against my better judgement bought some running tights. They are awesome and I much much warmer! They are true to size and well worth it. November 12, 2011
Heavyweight Tight I purchased mainly for hunting and ice fishing. I used for hunting at 20 degrees. The fit was great and very comfortable. Body hugging but not constricting. Very well made. I can't really state that for sitting long periods outside that the omni heat provided any more heat than my other brand baselayers. I believe to enjoy the omni heat you may have to be moving, providing body heat to fully utilize this benefit. November 8, 2011
warm and comfortable I bought these for my son to wear under his band uniform at football games. The other night was between 40 and 45 degrees with about a 10 mile per hour breeze. He said that they were great. Much better than the long johns he tried last year. I'm interested to see how they do when it gets a little colder. October 22, 2011
Excellent product - keeps you warm and dry I have used this product as a base layer for outdoor sporting events on exceptionally cold new england fall days and find it to be comfortabl; keeps you warm and the sweat is whisked away from the skin so you stay dry. It is non bulky and so you don't even feel it is there. A revolution for base layer on cold days for out door activities. September 23, 2011
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