How to Choose Base Layers
REI Co-op Lightweight Crew Base Layer Top - Women's
$29.95
A synthetic base layer for moderate temps, the women's REI Co-op Lightweight Short-Sleeve Crew keeps you dry and comfortable whether you're venturing into the mountains or trekking across open desert.
- Recycled polyester/spandex wicks sweat and dries quickly
- Fabric has a soft and silky feel for next-to-skin comfort
- UPF 50+ sun protection
- Underarm gussets ensure you can reach and move with ease
- Shaped shirttail hem stays tucked when you stretch
- Locker loop for hang-drying
- Weight (size S): 4.2 oz.
- Machine-wash warm; wash separately; do not use bleach or fabric softeners; tumble dry low and remove promptly
- REI Co-op brand is certified to The Climate Label; we actively fund efforts to reduce carbon emissions across our business and support climate projects around the world
- Made in a Fair Trade Certifiedâ„¢ factory
- Contains materials that meet the bluesign® criteria
Imported.
View all REI Co-op Women's Base Layer Tops| Best Use | Multisport |
|---|---|
| Shirt Type | T-shirt |
| Fabric | 94% recycled polyester/6% spandex (bluesign approved) |
| Sun-Protective Fabric | Yes |
| UPF Rating | 50+ |
| Moisture Wicking | Yes |
| Quick Drying | Yes |
| Underwear Weight | Lightweight |
| Sleeve Length | Short Sleeve |
| Gender | Women's |
| Sustainability | Contains materials that meet the bluesign® criteria Contains recycled materials Fair Trade Certified™ Factory From a Climate Label Certified brand |
REI Co-op Clothing - Women's
| XXS | XS | S | M | L | XL | 1X | 2X | 3X | 0 | 2 | 4 | 6 | 8 | 10 | 12 | 14 | 16 | 18W | 20W | 22W | 24W | 26W | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Numerical Size | 00 | 0-2 | 4-6 | 8-10 | 12-14 | 16 | 18 | 20-22 | 24-26 | 0 | 2 | 4 | 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 | 22 | 24 | 26 |
| Bust | 31 | 32-33 | 34-35 | 36-37 | 38.5-40 | 41-42.5 | 43-45 | 47-49 | 51-53 | 32 | 33 | 34 | 35 | 36 | 37 | 38.5 | 40 | 42.5 | 45 | 47 | 49 | 51 | 53 |
| Sleeve Length | 29.5 | 30 | 30.5 | 31 | 31.5 | 32 | 32.5 | 33.5 | 34.5 | 30 | 30 | 30.5 | 30.5 | 31 | 31 | 31.5 | 31.5 | 32 | 32.5 | 33.5 | 33.5 | 34.5 | 34.5 |
| Waist | 24.5 | 25.5-26.5 | 27.5-28.5 | 29.5-30.5 | 32-33.5 | 34.5-36.5 | 37.5-39.5 | 40.5-42.5 | 44.5-46.5 | 25.5 | 26.5 | 27.5 | 28.5 | 29.5 | 30.5 | 32 | 33.5 | 36 | 38.5 | 40.5 | 42.5 | 44.5 | 46.5 |
| Hip | 34 | 35-36 | 37-38 | 39-40 | 41.5-43 | 44-46 | 47-49 | 50-52 | 54-56 | 35 | 36 | 37 | 38 | 39 | 40 | 41.5 | 43 | 45.5 | 48 | 50 | 52 | 54 | 56 |
| Inseam | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 |
Sizing Notes
Measurements are stated in inches unless otherwise indicated. Size chart values represent body measurements, not garment measurements. Some women's pants are available in petite and tall sizes. Typically petite sizes fit women 4'11" to 5'3". Regular sizes fit women 5'4" to 5'8". Tall sizes fit women 5'9" to 5'11".
PETITE: Generally, as compared to regular sizes, petite sizes are 2.5 inches shorter in inseam, 1 inch shorter in body length, 1.25 inches shorter in sleeve length and ¾ inch shorter in total rise.
TALL: tall sizes are 3 inches longer in inseam, 2 inches longer in body length, 2.5 inches longer in sleeve length and 1.25 inches longer in total rise.
Capri or cropped pants have an intentionally shorter inseam—reference the technical specs instead of this chart.
Inseam is measured to the floor.
Buying Advice
More expert advice
Better gear is built together
From feedback to field testing, all of our gear is dialed-in by REI Co-op members. Their adventures informed every stitch and detail—making for better, longer-lasting gear.
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Location:Naperville IL
Height:5'8"
Age:35–44
Weight:175–200 lbs.
5 months ago
Comfortable and breathable!
Yes , I recommend this product
I purchased this shirt for a hike at Starved Rock. I am typically a M but opted for a large for a roomier feel. The M felt a little tighter on my arms. I love that the shirt has longer sleeves. The fabric is soft and breathable. I am planning to purchase a couple different colors.
Height:5'8"
Age:35–44
Weight:175–200 lbs.
Location:Georgia, USA
Height:5'5"
Weight:175–200 lbs.
3 months ago
Perfect for hot days
Yes , I recommend this product
I love this shirt. Perfect for hiking or just wearing out and about on hot summer days. The material is nice, not itchy/scratchy. I like the longer sleeves. Will be buying more in different colors.
Height:5'5"
Weight:175–200 lbs.
Location:AL
Age:65–74
Weight:150–175 lbs.
Height:5'6"
1 month ago
Durable, pleasing color and well made
Yes , I recommend this product
Originally, ordered a Lg, which was too snug for what I prefer. Exchanged at store for XLg and really like the material, the fit and the color.
Age:65–74
Weight:150–175 lbs.
Height:5'6"
Location:Idaho
1 month ago
Nice
Yes , I recommend this product
Very comfortable. Keeps you cool in the summer. Can be worn under another shirt. Great for traveling.
2 months ago
OK, but neckline is too high
No, I do not recommend this product
This shirt is ok, but it doesn't fit me quite right. Mainly the neck is very high, which I don't care for, but I should have figured that out from the photo. I got the green/turquoise and the color is nice. I've liked some of the other REI shirts more.
Location:Colorado
Age:75 or over
Weight:100–125 lbs.
Height:5'4"
1 month ago
Color is important
Yes , I recommend this product
An important feature of this item is the color. My shirt was a pretty teal green. The other color choices were drab and do not match other outdoor clothing like hiking pants and layers for hiking.
Age:75 or over
Weight:100–125 lbs.
Height:5'4"
Location:California
Age:65–74
Weight:150–175 lbs.
Height:5'3"
3 months ago
Awesome shirts...not just a base layer!
Yes , I recommend this product
These shirts are the best!!!! Very comfortable, wash very well, no itch, not tight but not loose...I bought 3 in different colors and I am living in them.
Age:65–74
Weight:150–175 lbs.
Height:5'3"
Height:Shorter than 5'
Weight:Less than 100 lbs.
4 months ago
Light and Comfy
Yes , I recommend this product
I like the lightness and comfort of this top. Will be wearing it a lot in the summer.
Height:Shorter than 5'
Weight:Less than 100 lbs.
Location:Vienna, VA
Age:25–34
Weight:100–125 lbs.
Height:5'3"
2 weeks ago
Great for Hiking and Travel
Yes , I recommend this product
A perfect hiking and travel shirt. Breathable, comfortable and has great coverage!
Age:25–34
Weight:100–125 lbs.
Height:5'3"
1 month ago
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