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Women’s Heavyweight II Baselayer Long Sleeve Top


http://www.columbia.com/womens-heavyweight-ii-baselayer-long-sleeve-top-1638971.html 1638971
$29.98 $65.00
Style# 1638971
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Size & Fit Guide | Reviewers rated this product Small | Fit Performance


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Style# 1638971


This sweat-wicking, long-sleeve layering shirt with thermal reflectors features 4-way comfort-stretch fabric and ergonomic seaming. Put it on first and you’ve got the perfect baselayer for spring, fall and winter recreation. Toasty!

  • Omni-Heat™ thermal reflective
  • Omni-Wick™
  • Antimicrobial treatment protects this product from bacterial growth
  • 4-way comfort stretch
  • Ergonomic seaming
  • Flatlocked construction
  • Performance Fit
  • Center Back Length: 26"
  • Imported

  • 85% polyester / 15% elastane stretch waffle Omni-Heat Reflective™
  • 85% polyester / 15% elastane Omni-Wick™ Stretch Jersey
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.


Rated 4.3 out of 5 by 6 reviewers.
Rated 5 out of 5 by wonderful under garment. Warm and comfortable. It can be worn by itself. The omni heat is great. February 6, 2016
Rated 3 out of 5 by Love omni heats! While the pants seem to run large on me, this top seems to run small. The arms are particularly tight. After examining the 2 pieces, I realize that the top is a waffle weave fabric with little stretch, while the pants are smooth with lots of stretch. I wish the top was the same as the pants. January 29, 2016
Rated 5 out of 5 by thermal undergarment This product runs small, but it sure did the job in keeping me warm under my outer shirt. The fit is just the way I like an undergarment to function. It's long enough to tuck into my pants and does not ride up. The sleeves are the perfect length also. January 25, 2016
Rated 4 out of 5 by This top runs a little small The body of the top fits fairly well, if a little snug (and I do have a larger chest), but oddly, the arms are noticeably tight. It's not bad enough that I cannot wear it, but I am ordering another one in an XL. January 17, 2016
Rated 5 out of 5 by a must have Fits snugly, but I guess it's meant to actually be that way to seal heat in. Has been keeping me warm in -20 ish weather underneath a rather flimsy parka. A must have for sure! January 14, 2016
Rated 4 out of 5 by Runs small I'm normally a size 6 and I could barely get the shirt over my chest. It was too constricting to wear for any length of time. With the omni-heat inside, there is no give to the fabric. January 1, 2016
  • 2016-02-13 T06:25:00.466-06:00
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Size & Fit Guide

Size Chart

Size & Fit Guide
Women's Body Measurement (Inches)
Size XS
Bust 32-33 34-35 36-37.5 39-40.5 42-44.5
Waist 25.5-26.5 27.5-28.5 29.5-30.5 32-33.5 35.5-37.5
Hips 34.5-35.5 36.5-37.5 38.5-40 41.5-43 45-47
Size L
Bust 39-40.5 42-44.5
Waist 32-33.5 35.5-37.5
Hips 41.5-43 45-47
How to Measure
  • 1. 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.
  • 2. Waist: Measure around the natural waistline, allowing the tape measure to sit comfortably.
  • 3. Hips: Measure around the fullest part of your hips.
  • 4. 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.
  • 5. Inseam: Measure from the top of the interior leg to the bottom of the ankle.
Women's Fit Guide
Body contouring fit conforms to movement.
Body skimming fit with end-use mobility in mind.
Modern Classic
Universal, easy fit for comfortable range of motion.
Most generous fit for a full spectrum of movement.

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
UPS Ground $6.00 3-7 Business Days
UPS 2-Day Air $12.00 2-3 Business Days
UPS 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