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Men’s Heavyweight II Stretch Baselayer Tight


https://www.columbia.com/mens-heavyweight-ii-stretch-baselayer-tight-1638551.html 1638551
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Style# 1638551
Uses Winter


A toasty compression baselayer for dynamic activity in the deep cold, this heavyweight tight is a strategic hybrid of stretchy, body heat retaining thermal reflective waffle fabric and Omni-Wick stretch jersey. The result? The perfect balance of warmth and move-with-you comfort.

  • Antimicrobial treatment protects this product from bacterial growth
  • Ergonomic seaming
  • Flatlocked construction
  • Gusset detail
  • Omni-Wick™
  • 4-way comfort stretch
  • Omni-Heat™ thermal reflective
  • Imported
  • Uses: Winter
  • Style# 1638551

  • 85% polyester / 15% elastane Omni-Heat Reflective™ 210g Stretch Jersey
  • 85% polyester / 15% elastane stretch waffle Omni-Heat Reflective™
Omni-Heat™ Reflective
Thermal Reflective Warmth
High-Performance Wicking Fabric

Technology Videos

Play youtube video about Omni-Heat Reflective (tm)
Omni-Heat™ Reflective
Magic in a littlesilver dot.
Breathable material with little silver dots that reflect body heat.
Play youtube video about Omni-Wick (tm)
Pulls moisture away from the body so sweat can evaporate quickly.


Men’s Heavyweight II Stretch Baselayer Tight is rated 4.4 out of 5 by 34.
Rated 5 out of 5 by from Keeps My Bottom Warm, No Matter The Pant Received these just as the coldest part of this winter arrived in the Tahoe Area. Used for multiple activities, including snowshoeing and alpine skiing. Kept me warm no matter the pant I wore. No bulk and fits just right.
Date published: 2018-04-04
Rated 4 out of 5 by from Pretty warm I wore this to Alaska, just this and my snow pants, not cold at all even 1am outside
Date published: 2018-03-31
Rated 5 out of 5 by from Base layer Lovely and comfortable and great fit
Date published: 2018-03-29
Rated 5 out of 5 by from Great investment. Kept me nice and warm during all the bad cold weather we got in SC this year. I walk about a half mile to our duck blind and they were also breathable enough to keep me from overheating.
Date published: 2018-03-18
Rated 5 out of 5 by from Excellent thermal underwear I bought the thermal top and was so impressed by how warm it was I bought the bottoms as well. The reflective surface on the inside really keeps the heat in. They are comfortable as well. Highly recommended.
Date published: 2018-03-14
Rated 5 out of 5 by from Baselayer bottom Very good baselayer bottom. Works well and feels nice.
Date published: 2018-03-10
Rated 5 out of 5 by from Warm and Snug fit not Bulky. Warm and snug, not bulky. I am a professional skier, a powder guide, at Powder Mountain in Utah. I spend most of my days above 8000 feet. I bought the tops and bottoms and I love the insulatI’ve properties. also they are much warmer then their thickness would suggest. It seems the reflective inside layer achieves the same or better results than adding density to the polypropylene! The reflective interior seems to do the job as they claim. If it works for me chances are it will work for you.
Date published: 2018-03-06
Rated 5 out of 5 by from Great Product Performs as expected. Delivered as expected. Great product. I am 6'2", 240 and the nice fit surprised me. Keeps me warm in the frozen tundra of (rural) MN
Date published: 2018-02-28
Rated 5 out of 5 by from Nice and comfortable Fits really nice and works as advertised (This review was collected as part of a promotion.)
Date published: 2018-02-25
Rated 5 out of 5 by from Lightweight but warm This baselayer does a great job of keeping you warm but it is not heavy.
Date published: 2018-01-16
Rated 5 out of 5 by from Omni Heat heavy base layer Warn and comfortable. Well made and very durable. Been wearing some form of this product for almost 10 years. No complaints. Can be a little tight if you have big calves.
Date published: 2018-01-14
Rated 5 out of 5 by from This stuff really works!!! I had bought the base layer for family members who are hunters, and bought myself a pair before attending the Music City Bowl. Weather was in the teens and 20's and I was plenty warm. Wore the heavy weight bottoms and a mid-weight top, because I also have a Turbo Down Omni Heat Jacket. Perfect layering. My husband did not wear his and was freezing! lol
Date published: 2018-01-03
Rated 4 out of 5 by from Happy with purchase! Bought these for my husband and they fit great. He said they are very warm. 2 thumbs up. (This review was collected as part of a promotion.)
Date published: 2017-12-17
Rated 5 out of 5 by from Baselayer My husband is ski instructor, he’s very pleased with this product
Date published: 2017-11-09
Rated 4 out of 5 by from The only base layer you need I've had many base layers in my 35 years of staying warm in the extreme cold. Most have served their purpose mostly, but have lacked in varying elements. I've finally found exactly what I need - whether it be skiing, climbing, or just being in the cold weather. The men's heavyweight base layer from Columbia provides reliable resistance to the cold, while aiding in warming you up a bit more with the omni heat interior. It's a crazy concept to wrap your head around before experiencing it, but let me tell you, it works! The base layer doesn't absorb moisture either and breathes well going out, but is very wind resistant when you are switching out layers and exposed directly to the weather. I'd highly recommend this to anyone looking for a solve all base layer.
Date published: 2017-11-09
Rated 5 out of 5 by from Perfect comfort I travel extensively in Mongolia, usually during Winter. And I also travel to Arctic and the Antarctic regions. This had me running around trying all brands of base layer clothing to keep me warm. All the brands that I tried over the years were not effective, too hot, badly fitting, and poorly constructed. Frustrated for years. Last trip to Mongolia I visited a backpacking store in Ulaanbaatar. They had this product on sale. Snapped it up. For the next 3 weeks I was the most comfortable I have ever been in Winter. It never got rank considering no running water. Got back to the states and bought another one.
Date published: 2017-10-20
Rated 5 out of 5 by from A Good solid base layer When its cold (Under20f) these are my go to pair - a good solid warm under-layer when its below normal skiing temps. nothing fancy but nice and warm
Date published: 2017-05-07
Rated 3 out of 5 by from Good for some things, not others I wore these for the first time while steelhead fishing on the Clackamas River in temperatures at freezing to a bit below. They kept me from getting chilled but not warm; on the whole no better than polypro long underwear that I bought at REI many years ago. They do keep you warm if you are active but not if you are sitting still.
Date published: 2017-02-01
Rated 5 out of 5 by from When the going gets cold This is a quality product. We got the for out of doors base layering and sleeping in. They are comfortable and warm.
Date published: 2017-01-05
Rated 1 out of 5 by from Avoid Completely! These may be OK when one is active, but the thermally reflective surface gets cold against your skin when touched by the slightest breeze. I work in security, and it entails a lot of hours standing guard in the winter cold. I am a veteran and now work in government security. The first time I wore these I was shivering within 30 minutes of starting my shift, and it was in the 40's. The next day I tried them with another layer, made by Techwick, under them, and I still felt the silver dots get cold and clammy. The jackets actually work as intended, and that's what drove me to waste my money on this garbage. Please avoid my mistake and get something else if you are a soldier or security professional. Apologies to Columbia, I am sure they are nice people, I just care too much for the people I have worked with, some of whom have lost their lives protecting others. Best wishes
Date published: 2016-12-19
Rated 5 out of 5 by from Heavyweight II Baselayer Purchased this for duck/goose hunting and fishing on those cold damp winter days. Very light weight, complete freedom of movement, wicks sweat away from your body after a rigorous workout setting up and bringing in decoys. All I can say PERFECT!
Date published: 2016-12-01
Rated 5 out of 5 by from Excellent quality This runs true to size and is very well made. Highly recommended.
Date published: 2016-10-05
Rated 4 out of 5 by from heavyweight baselayer I have been looking for a good baselayer for some time now. I have tried just about every manufacture out there. They just would not fit right, the material would not feel good or they be full of static witch I can't stand. This baselayer is the only one I found that fit true to size felt good kept me warm in 30 degree weather and kept me cool when I started sweating. I plan on buying another pair to have as a extra.
Date published: 2016-03-14
Rated 5 out of 5 by from Great product Warming and comfy. It's vary reasonable order
Date published: 2016-03-03
Rated 5 out of 5 by from Very warm for winter Good quality, so comfy.
Date published: 2016-02-23
Rated 5 out of 5 by from Very Warm products This is very warm and can be one of the best undergarments money can buy!!!
Date published: 2016-02-15
Rated 2 out of 5 by from This product has great features I received a pair as a Christmas gift. I like the feel. They where even able to find them in a tall, which is amazing. It's so nice to have something long enough, even if they did have to go to the men's department for it. I was looking forward to the warmth of long johns from my youth, and I just didn't get that.
Date published: 2016-02-13
Rated 5 out of 5 by from Great product! Bought these as a Xmas gift for my brother in law who is a salesman at a car dealership and has to fight the winter cold - going in and out of the showroom all day. He was looking for a quality pair for a long time and he just loves them. His best Xmas gift! Thanks Columbia!
Date published: 2016-02-04
Rated 4 out of 5 by from works well i got this for my husband who works outside and wanted something that would keep him warm. this product works well and he likes it. i got him a med based on his pants size based on the sizing info and wished i would have gotten a large
Date published: 2016-01-25
Rated 2 out of 5 by from Not warm I love the Omni heat products but this one is not warm. At only 32 degrees outside I could feel the air through these and my pants. I would not recommend them.
Date published: 2016-01-23
Rated 5 out of 5 by from Heavyweight tight I am very pleased with how this article of clothing performs in the cold weather. Exceptional warmth for the outdoor enthusiast!
Date published: 2016-01-22
Rated 5 out of 5 by from Staying warm I'm a huge Columbia fan. if you want to stay nice and warm buy these! As alway Columbia's quality shines with this product.
Date published: 2016-01-16
Rated 3 out of 5 by from Baselayer I was excited to get these pants and use them under my ski pants when i skied. I wore them on a pretty warm day under my ski pants thinking they were going to keep me warm. Big mistake! These did not keep me warm at all. I was cold. The material was great and price was good. I was bummed the micro beads didin't do their job. These pants should be labeled medium weight instead of heavy weight. My long johns keep me warmer than these pants.
Date published: 2015-12-30
Rated 5 out of 5 by from In a Tight Spot This is another outstanding product from Columbia Sportswear. It fits great, has the potential for being worn comfortably a long time on many days, and for keeping one warm and dry. It's just perfect.
Date published: 2015-10-07
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Size & Fit Guide

Size Chart

Size & Fit Guide
Men's Body Measurement (Inches)
Pant Size 28-30 32 34 36 40 44
Waist 26-29 29-32 32-35 36-39 40-43 44-47
Hips 32-34 35-37 38-40 41-43 44-46 48-50
Inseam Varies by Item
Pant Size 36 40 44
Waist 36-39 40-43 44-47
Hips 41-43 44-46 48-50
Inseam Varies by Item
How to Measure
Mens size chart measurement guide
  • 1. Neck: Measure at the base or thickest part of your neck.
  • 2. Sleeves: Start at the center back of your neck and measure across the shoulder and down to the wrist. Round up to the next even number.
  • 3. Chest/Bust: Measure at the fullest part of the chest, under the armpits and over the shoulder blades, keeping the tape measure firm and level.
  • 4. Waist: Measure around the natural waistline, allowing the tape measure to sit comfortably.
  • 5. Hips: Measure around the fullest part of your hips.
  • 6. Inseam: Measure from the top of the interior leg to the bottom of the ankle.
Men's Fit Guide
Body contouring fit conforms to movement.
mens performance fit bottom
Body skimming fit with end-use mobility in mind.
mens active fit bottom
Modern Classic / Regular
Universal, easy fit for comfortable range of motion.
mens modern classic fit bottom
Most generous fit for a full spectrum of movement.
mens relaxed fit bottom

How to Measure

Columbia Fit Guide

How to Measure

  • Fold up at dotted line.
  • Place against a wall or other 90 degree surface.

    Place heel against fold/wall on flat level surface.
  • Mark the end of the longest toe with a pen or pencil.
  • Measure both feet and use the larger measurement.
  • Read measurement and compare to size chart.
  • When comparing on the size chart, determine the closest larger measurement and use that number to determine your shoe size for your country’s shoe measurement standard.

Shipping & Returns

Shipping & Returns

Shipping Information

Shipping Method Rate Expected Delivery Time
Ground $6.00 3-7 Business Days
2-Day Air $12.00 2-3 Business Days
Overnight $19.00 1-2 Business Days
Free Standard Shipping

Return Policy

Returns are accepted within 60 days of the purchase date online or in-store. Your apparel must be in original and unworn condition, with tags still attached. Footwear returns must also include the original box.

Still Have Questions

See our Customer Service section for more details. Visit Customer Service

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