Swipe for more images

Women’s Midweight Stretch Baselayer Long Sleeve Half Zip Shirt


https://www.columbia.com/womens-midweight-stretch-baselayer-long-sleeve-half-zip-shirt-1639001.html 1639001
Members get free shipping + 600 Greater Rewards points


Hurry, this style is selling fast!

Product Actions

Add to cart options
Add to Wishlist


Style# 1639001
Uses Winter


This wicking, performance fit jacket features ergonomic seaming, 4-way comfort stretch fabric, a thermal reflecting liner and the always-popular thumbholes at the cuff.

  • Omni-Heat™ thermal reflective
  • Omni-Wick™
  • 4-way comfort stretch
  • Antimicrobial treatment protects this product from bacterial growth
  • Ergonomic seaming
  • Flatlocked construction
  • Thumb holes
  • Center Back Length: 27"
  • Imported
  • Uses: Winter
  • Style# 1639001

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


Women’s Midweight Stretch Baselayer Long Sleeve Half Zip Shirt is rated 5.0 out of 5 by 9.
Rated 5 out of 5 by from Great base layer Soft and comfortable. Definitely contoured fit. Love the Omni heat fabric! Perfect base layer.
Date published: 2018-09-09
Rated 5 out of 5 by from LOVE Omni heat Love this shirt! I have recommended to several of my running/cycling friends. Light weight, provides warmth without having to layer. I would love to have it in several colors.
Date published: 2017-11-25
Rated 5 out of 5 by from My favourite walking top I'm out every day in all weather and temperatures walking my dog and this has become my all round favourite top to wear for a base layer. It is comfortable and breathable and also looks great. It's very versatile - I have worn it on fairly cold days as well as warmer ones, and I have been quite comfortable. I thought I wouldn't use the thumb holes, but I find I actually really like having them. I am usually a size medium, and that's the size I purchased. It fits snugly, right up into the underarms, so if you're borderline medium/large, you might want to go to the large. (This review was collected as part of a promotion.)
Date published: 2017-05-06
Rated 5 out of 5 by from So Warm! I love this half zip! I am generally cold, but I can throw this on and warm up! This is a true baselayer so it's not meant to have a shirt underneath. I usually wear size small, but I wanted to be able to wear a tank under and don't like shirts that are tight in the underarm area so I bought a medium and it's perfect! It's also great for camping as something light that keeps you super warm.
Date published: 2016-09-23
Rated 5 out of 5 by from Fits a little small This colour dark pink and bright geranium shirts that I bought were on sale at the time and only black is currently available. They do fit a little small but I love these shirts and the rich colours. I wouldn't hesitate and buy one again if offered in a rich colour.
Date published: 2016-06-18
Rated 5 out of 5 by from Excellent Product I am 5' 4" tall & around 95 lbs with long arms & legs, & my daughter is 5' 6-7" tall & around 110 lbs, &, as my daughter so eloquently put it when she was much younger, "Everyone is bigger (in the bust) than you are Mom!" She isn't all that big in the bust either. I bought myself 1 in black (Small), & my 22 year old daughter 1 in light blue (Small) for Christmas. As soon as she opened it, she excitedly said "Omni-heat!" I told her she ALMOST didn't get that, but with her working graveyard shift at a hotel on the beach, it gets really cold with the windchill factor. She said she couldn't wait to wear it under her uniform & to hockey games. I haven't seen her get so excited over just clothes before (she only got Columbia in the way of clothes & jackets this year). She said she loves the thumb holes (so do I), because in a short walk, she can pull those up & not have to dig out her gloves. In high school, she mainly wore surfer clothes, since that was "the style." She now knows the quality of Columbia, & after I bought her an Omni-heat coat many years ago on a whim, she's been a Columbia fan ever since! She didn't have any sizing problems, but I thought mine was a wee bit tight in the neck, but it was plenty long enough in the arms (every other brand I have to order a Medium to insure the arms are long enough). Even though they say this is a base layer, it's pretty enough that both of us wear this as a regular shirt. On some warmer days that will get colder at night, I'll wear a camisole or tank top under it for modesty when I unzip the top during the day or inside (I stay colder than she does most of the year, so I wear Columbia a lot). If you live in cooler to cold climates or are going to cold climates, this a "must have" in your wardrobe. Try it! You won't be disappointed!
Date published: 2016-02-19
Rated 5 out of 5 by from My Most Favorite Top It says "fit jacket", and that is true. It has a gentle body hug, thats not to tight, and not to loose. The thumb hole is great. The zipper allows the shirt to 'show a little' or be more conservative. The feel of the shirt is wonderfully soft. Like the title says, its my most worn top.
Date published: 2015-12-29
Rated 5 out of 5 by from Looks good, feels good I've worn this shirt a couple of times. It has a great fit and feel, and it looks great on me to boot. It's very comfortable and allows me to move freely. It does help keep me warm, when I've worn it alone or layered it under a coat. I am a fan!
Date published: 2015-12-11
Rated 5 out of 5 by from Great piece I recently ordered and received this top and it is a great piece to wear for casual outside activities to hard workouts! It looks really good too!
Date published: 2015-11-12
  • y_2018, m_9, d_21, h_16
  • bvseo_bulk, prod_bvrr, vn_bulk_2.0.8
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_9
  • loc_en_US, sid_1639001, prod, sort_[SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_columbia

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

Greater Rewards - Join the adventure
free shipping always
earn points & rewards
points for sharing
member only offers