How to Choose Base Layers
REI Co-op Midweight Base Layer Crew Top - Men's
This product is not available. Good news: we have a newer version.
Stay insulated and dry during highly aerobic winter fun—such as skiing, hiking and snowshoeing—in the REI midweight base layer crew top.
Shop newer version- Durable polyester/spandex blend wicks moisture and dries quickly
- Mineral-based LAVA XL™ finish keeps fabric odor-free
- Flatseam construction, raglan sleeves and side gussets keep you comfortable as you move
- Droptail hem won't expose your back when you bend over and settles nicely under a pack's hipbelt
- UPF 50 sun protection
- Fitted
- 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
- Contains materials that meet the bluesign® criteria
| Best Use | Multisport |
|---|---|
| Shirt Type | T-shirt |
| Fabric | 89% polyester/11% spandex (bluesign® approved) |
| Sun-Protective Fabric | Yes |
| UPF Rating | 50 |
| Moisture Wicking | Yes |
| Quick Drying | Yes |
| Sleeve Length | Long Sleeve |
| Gender | Men's |
| Sustainability | Contains materials that meet the bluesign® criteria 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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Most Helpful Favorable Review
4 people found this review helpful
8 years ago
Backpacking
Bought for nights during backpacking trip on AT. Temps were in the low 20's and it was a comfortable, warm, lightweight base layer. Very satisfied!
Yes , I recommend this product
jacobh91
Richmond, VA, United StatesMost Helpful Critical Review
7 people found this review helpful
8 years ago
Material is nice. HUGE neck.
Material is great. Overall size runs larger than other REI shirts. The hole for the neck is enormous and makes the shirt look ridiculous. Very odd.
No, I do not recommend this product
skimtastic
Chicago, IL, United StatesLocation:Chicago, IL, United States
8 years ago
Material is nice. HUGE neck.
No, I do not recommend this product
Material is great. Overall size runs larger than other REI shirts. The hole for the neck is enormous and makes the shirt look ridiculous. Very odd.
Location:Richmond, VA, United States
8 years ago
Backpacking
Yes , I recommend this product
Bought for nights during backpacking trip on AT. Temps were in the low 20's and it was a comfortable, warm, lightweight base layer. Very satisfied!
Location:North Tustin, CA, United States
8 years ago
Like wearing a rainbow
Yes , I recommend this product
Used these bad boys whilst snowboarding up in the Wasatch front. They fit well. The fabric is soft like your favorite puppy but strong and resilient like bull. I love them. The only reason I took them off was because it's still not socially acceptable to roam about in my underwear. I highly recommend you get yourself a pair.
Location:Springdale, AR, United States
8 years ago
Great base layer for the money
Yes , I recommend this product
Rei brand base layers are such a good value for the money and this version is more of the same. Very warm, Wicks moisture well. Even great to wear as a single layer if in the 50s or so. Only issue: this model runs large, I usually wear a large in rei brands and a large drowned me; I had to exchange for a medium.
Location:NC
8 years ago
Nope
No, I do not recommend this product
I agree with "skimtastic" - the material is really nice. The neck size is absurd - it looks like some brutes played tug of war with the shirt. While the rest of the fit is nice, the neck looks silly and, for me, is uncomfortable - I will be returning.
Location:Centreville, MD, United States
8 years ago
Great top for running in cold
Yes , I recommend this product
Warm top for running in the cold. Fits snug (took a medium vs. normal large) and feels great against your skin. Drys quickly and stays warm even after standing around after activity. Bought a second one for my son.
Location:Sacramento, CA, United States
8 years ago
Very comfy and hides the stench
Yes , I recommend this product
I bought this a few weeks ago for a 5 day trip in the sierra's. It was very comfortable and good for layering at night. This did a great job of hiding my odor for the trip which was no easy task.
8 years ago
Good, not great, fit
The fit on these is pretty decent. Snug in the arms and chest but noticeably looser in the lower chest and trunk area. Breathability and warmth are both good.
Location:Reykjavík, Iceland
8 years ago
Well worth it
Yes , I recommend this product
I bought this for my trip to Iceland and it worked very well. Great as a second layer.
Location:Keizer, OR, United States
7 years ago
Great shirt
Yes , I recommend this product
Bought this because it was a mid weight base layer garment, 89%polyeste, and 11% spandex., woven in a fine knit finish.. It has exceeded my expectations, and I find it comfortable to wear around the house this winter time of year. And, to my surprise, it’s made in the USA!
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