How to Choose Base Layers
REI Co-op Lightweight Crew Base Layer Top - Men's
$29.95
Members get an est. $2.99 in rewards
A synthetic base layer for moderate temps, the men'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
- Locker loop for hang-drying
- Back length on size M: 28 in.; back length on size M Tall: 30 in.
- Weight (size M): 5 oz.
- Machine-wash warm; wash separately; do not use bleach or fabric softeners; tumble dry low and remove promptly
- Contains materials that meet the bluesign® criteria
- Made in a Fair Trade Certified™ factory
- 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
Imported.
View all REI Co-op Men'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 | Men'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 - Men's
| XS | S | M | L | XL | XXL | XXXL | 24 IN Waist | 26 IN Waist | 28 IN Waist | 30 IN Waist | 31 IN Waist | 32 IN Waist | 33 IN Waist | 34 IN Waist | 35 IN Waist | 36 IN Waist | 38 IN Waist | 40 IN Waist | 42 IN Waist | 44 IN Waist | 46 IN Waist | 48 IN Waist | 50 IN Waist | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chest | 35 | 36 - 38 | 39 - 41 | 42 - 45 | 46 - 49 | 50 - 53 | 54 - 57 | |||||||||||||||||
| Sleeve Length | 32 | 32.5 | 33 | 33.5 | 34 | 34.75 | 35.5 | |||||||||||||||||
| Waist | 27.5 | 28 - 30 | 32 - 34 | 36 - 38 | 40 - 42 | 44 - 46 | 48 - 50 | 24 | 26 | 28 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 38 | 40 | 42 | 44 | 46 | 48 | 50 |
| Hip | 33.5 | 34.5 - 36.5 | 37.5 - 39.5 | 41 - 43 | 44 - 46.5 | 47.5 - 50.5 | 51.5 - 54.5 | 32 | 33.5 | 34.5 | 36.5 | 37 | 37.5 | 38.5 | 39.5 | 40.25 | 41 | 43 | 44 | 46.5 | 47.5 | 50.5 | 52.5 | 54.5 |
| Inseam | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 |
Sizing Notes
Measurements are stated in inches unless otherwise indicated. Size chart values represent body measurements, not garment measurements.
SHORT: Some pants are available in short sizes, which generally means an inseam that is 2.5 inches shorter than regular sizes.
TALL: Some pants, shirts, jackets and parkas are available in tall sizes, which generally means an inseam that is 3 inches longer and a rise that is 1 inch longer, a shirt or jacket body that is 2 inches longer, a parka body that is 2.5 inches longer and sleeves that are 2.5 inches longer than regular sizes.
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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Mike
Ruckersville, VA
Short time love affair
2 months ago
I love this shirt! Light weight, dries very quick and oh so comfortable! Sad news though. I wore it only twice. I went on an annual birthday canoeing, camping, fishing trip and this shirt was made for this! I was into my 3rd day wearing it and it stayed clean, dry and didn't stink! I took it off, put on my life vest, and was sitting on the shirt in the seat of our canoe....the water was high and very cloudy. Our canoe was loaded and we hit a rock that we could not see in a rapid and took on water as I tumbled out of the canoe. Sadly, my shirt and my buddy's fishing pole were lost. I'm going to miss this shirt and will more than likely buy another one....loved the color and feel of it, sad to see it go so quickly!
Age:55–64
Weight:175–200 lbs.
Height:5'10"
Yes , I recommend this product
Michael
Santa Cruz CA
Shrinking Tees
2 days ago
I think that men’s sizes are shrinking. I have been buying Medium men’s Tees both cotton and Polyester from REI for many many years. Have had a very comfortable fit with Med but for the last few years the same style shirt has more spandex and is a much tighter fit. Today I had to return two Med for the Large version of the same shirts. The large do not fit the same- longer and shoulder is hanging over my arm. They do not fit the same as the older styles.
Height:5'9"
Age:65–74
Weight:175–200 lbs.
Yes , I recommend this product
TJR
Colorado
Durable and comfortable.
3 months ago
Great as an under layer in all kinds of weather. Easy to wash in a sink, and dries quickly. No sign of wear after alternating between two shirts after a 102 day trip in winter to summer conditions.
Age:65–74
Weight:150–175 lbs.
Height:6'3"
Yes , I recommend this product
Wax
Different than previous versions
3 months ago
I looked at this product in store and it is not as nice as last year's version. I liked the raglan sleeves and the waffle style fabric of the previous version. Please bring that version and material back.
No, I do not recommend this product
Conrad
Louisiana
REI dry fit shirt
2 days ago
Good fit and comfortable. And caught the Labor Day sale.
Age:65–74
Weight:175–200 lbs.
Height:5'11"
Yes , I recommend this product
Avid Hiker
4 weeks ago
Anonymous
1 month ago
Anonymous
1 month ago
Old Eagle Scout
1 month ago
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1 month ago
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