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Women’s Heavyweight II Baselayer Long Sleeve Half Zip Shirt


https://www.columbia.com/womens-heavyweight-ii-baselayer-long-sleeve-half-zip-shirt-1638961.html 1638961
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Style# 1638961
Uses Winter


Now with thumbholes, this performance fit baselayer wicks sweat and is built for warmth and mobility with a blend of stretchy, heat-retaining thermal reflectors and ergonomic seaming. Dressing in layers is key when it comes to adapting to the changing conditions.

  • Omni-Heat™ thermal reflective
  • Omni-Wick™
  • Antimicrobial treatment protects this product from bacterial growth
  • 4-way comfort stretch
  • Ergonomic seaming
  • Flatlocked construction
  • Thumb holes
  • Performance Fit
  • Center Back Length: 26"
  • Imported
  • Uses: Winter
  • Style# 1638961

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

Technology Videos

Play youtube video about Omni-Wick (tm)
Pulls moisture away from the body so sweat can evaporate quickly.


Women’s Heavyweight II Baselayer Long Sleeve Half Zip Shirt is rated 4.0 out of 5 by 17.
Rated 5 out of 5 by from Fits well I haven’t had a chance to really test the warmth, although when I was trying this on in my apartment I did get pretty toasty. I bought a medium, I am 5’9”, 34 DD, 150 pounds and it fit perfectly.
Date published: 2017-10-27
Rated 5 out of 5 by from so great the best base layer keeps you toasty!!!
Date published: 2017-02-12
Rated 3 out of 5 by from A little disappointed :-( I read online that this baselayer ran a little small, so I looked at the size chart and ordered a size large. It's much too large. Worse, I was expecting it to keep me toasty while skiing, and it doesn't. Not toasty. Not warm. No better than my much less expensive baselayer that I was wearing before. So, although the quality of the construction and the look are lovely, I'm disappointed that it doesn't fit as I was led to believe and certainly doesn't deliver in terms of the warmth I was expecting.
Date published: 2017-02-08
Rated 2 out of 5 by from Product is too tight This base layer is too small and tight. I had to return it. The quality looked good. I guess Ill have to get 2 sizes bigger.
Date published: 2017-01-23
Rated 5 out of 5 by from Great cold weather baselayer I liked this so much, I bought another right away. I can wear just this with a soft shell jacket on a 20 degree day and be perfectly comfortable on my walk. I'm 5'6", size 6 with broad shoulders and long arms. The medium was just right for me.
Date published: 2017-01-13
Rated 4 out of 5 by from it's true to size. I read the review and bought one size up. But it's then too large for me. PUt it here to remind the later buyers.
Date published: 2017-01-04
Rated 5 out of 5 by from A little small, but assume it will stretch. I have an older version of small, and this is cut a little tighter, esp the sleeves and underarms. The fabric is ribbed and very strong, but I assume garment will relax with time. Love purple color. If you're not quite a "true" size, consider going a size up. Runs a little small= did not return it.
Date published: 2017-01-03
Rated 5 out of 5 by from Comfortable base layer top This top is a great baselayer, super comfy and warm. This runs very true to size for me. I am 5'6", 130lbs and am always in the small size range. All the reviews stated this item ran very small and to order up a size so I got a medium first, it was huge!! Billowing sleeves and super baggy in the body. I exchanged for a small and it's perfect. It could even be a bit more form hugging around the mid section as these type of tops are supposed to be almost a compression fit, but I think that will give it room to layer over a sport tank. I haven't tested it in cold conditions yet but am headed to Zion next week for New Years and will get lots of use out of it there. Should be perfect!
Date published: 2016-12-21
Rated 5 out of 5 by from Love it! Fits perfect, perfect under layer to keep you warm!
Date published: 2016-12-19
Rated 2 out of 5 by from Very tight fit I just bought a size S hoodie at a Columbia store and it is loose on me. I bought a pair of M base layer bottoms which fit fine and thought I could grab the M top. When I got home I realized I hadn't tried the top on, which turns out was a huge mistake. I'm surprised by how all over the place Columbia's sizing is; at least when I was at the store I was able to easily grab another size when predicted sizes didn't fit (a pair of leggings that would have been S in another brand I had to get in L, e.g.). I am about to head somewhere very cold and unfortunately the Columbia store is an hour drive away, so I guess I will just have to do without a thermal top. I'm usually a size S or M in shirts, but I would call this more of an XS. It's very tight across the bust and uncomfortably tight over my arms. There is little give to the fabric. I wish I could try on a L and XL but unfortunately it's too late. Columbia makes great gear but I've learned the lesson that you *have to* try it on first due to their unpredictable sizing. It's strange that I'd fit most comfortably in an XS hoodie and XL thermal top.
Date published: 2016-11-20
Rated 4 out of 5 by from Not what I needed I did not realize this was a bottom layer for outdoor sports and what I needed was a top to wear with or without a vest. The fit of the medium for my 5'4" 36C was too snug for my purpose but but would have been fine as an undergarment for skiing or hiking. The length was long, but would have stayed tucked in nicely and I love having thumb holes in tops to keep my hands warmer in cold weather.
Date published: 2016-05-28
Rated 4 out of 5 by from Happy with Heavyweight II In my opinion, this Heavyweight II layer has/can: - a nice deep purple colour (is consistent as shown in the product image) - provide enough warmth for doing your favourite snowsports/activity in places at slightly higher elevation (e.g., snowboarding/skiing in the cold Whistler weather) - (XS heavyweight) more room, and not as skin-hugging, compared to the XS mid-weight long-sleeve which I bought two years ago. Though, I prefer the omni-heat side closer to my skin like the mid-weight...this heavyweight isn't baggy nor too loose either. This is still a staple piece which I would recommend to most.
Date published: 2016-04-04
Rated 3 out of 5 by from Warm I have the purple. It is a beautiful color. The sizing is very small. I usually wear a small and buy a medium when I want it looser. The medium is very snug. It snags easily. The velcro on my ski jacket snagged up the sleeve near the thumb holes.
Date published: 2016-03-20
Rated 4 out of 5 by from Feels Tight in Sleeves I really like Columbia products, however, as in previous reviews, I have to say that their tops consistently run small. I'm 5' and have a 36DD chest. It seems like Columbia creates tops to fit tall, skinny ladies so as a lady who is short, curvy and isn't very "lean" I have to order XL tops to fit my chest but then the sleeves and length are long. The extra length doesn't bother me as it helps keep the top tucked in but the sleeves bunch under a jacket. The sleeves also feel tight in the lower arm. The performance of the top is good. I stayed warm during a cold, windy snowshoe hike. I'm a big fan of the Omni Heat products. It wasn't quite as wicking as I'd like but it could have been due to other layers I was wearing over the base layer. The dog jumped up on me and snagged the material but by the nature of the fabric I don't think that could be helped. The Inkling color is very nice and I received a lot of compliments on it.
Date published: 2016-02-21
Rated 5 out of 5 by from Runs small!! I wear an XS in everything at Columbia. Ordered this knowing it might be a bit more snug, but it was very small! (I'm 5-1, 115, curvy build). Had to send it back, there was no way!!
Date published: 2016-01-12
Rated 2 out of 5 by from Not what I expected Very thin. Definitely not heavyweight material. Concerned it will not keep me warm as a base layer. Would not recommend.
Date published: 2016-01-07
Rated 5 out of 5 by from How to stay warm This is the best product I have tried in the winter. I can finally stay warm in the cold mornings feeding all the horses.
Date published: 2016-01-02
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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
Womens size chart measurement guide
  • 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.
womens performance fit top
Body skimming fit with end-use mobility in mind.
womens active fit top
Modern Classic / Regular
Universal, easy fit for comfortable range of motion.
womens modern classic fit top
Most generous fit for a full spectrum of movement.
womens relaxed fit top

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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