How to Choose Base Layers
REI Co-op Merino 185 Long-Sleeve Half-Zip Base Layer Top - Men's Tall Sizes
$89.95
Members get an est. $8.99 in rewards
The ultrafine merino wool of the men's REI Co-op Merino 185 long-sleeve half-zip base layer top is an ideal soft, breathable, odor-resistant layer for sweating on the trail—and sleeping in a tent.
- Ultrafine 185 g merino wool offers a soft feel without any itchiness
- Made with 100% merino wool that naturally breathes, wicks away sweat, dries quickly and resists odors, making it an ideal multiday trip companion
- UPF 30 sun protection
- Half-zip front helps with venting; standing collar and chin guard for protection
- Flat seams and merrow stitch construction eliminate chafing
- Underarm gussets allow full range of movement
- Designed to hug the body for optimum performance
- Back length: 30 in.
- Weight: 9 oz.
- Machine wash warm, gentle cycle, with wool wash product; do not twist or wring; remove promptly; do not bleach; tumble dry low; dry cleaning not recommended
- Field-tested on its own and as a base layer while hiking, running, rock climbing, cycling, skiing and camping in diverse climates across the U.S.
- 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 the REI Co-op Merino 185 Product LineView all REI Co-op Men's Base Layer Tops| Best Use | Multisport |
|---|---|
| Shirt Type | Partial-zip |
| Fabric | Merino wool |
| Sun-Protective Fabric | Yes |
| UPF Rating | 30 |
| Moisture Wicking | Yes |
| Quick Drying | Yes |
| Underwear Weight | Lightweight |
| Sleeve Length | Long Sleeve |
| Gender | Men's |
| Sustainability | 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
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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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Dave from Massachusetts
I want to wear it every day.
3 years ago
Great fit and very comfortable. I like the low profile seam stitching. And it comes in tall sizes! I wore this shirt for days and you wouldn’t know it, does the merino thing well and doesn’t stink. Great base layer and even looks good around town. I ordered this and the Smartwool 150. Kept this one and sent the Smartwool back.
Height:6'3"
Weight:175–200 lbs.
Yes , I recommend this product
444allis
Love REI merino, love REI tall sizes
2 years ago
With a 77 inch wingspan the tall size fit perfect. Kept me cool in the heat, warm in the rain and cold. Most importantly kept me odorless on an eight day backpack hunt.
Age:55–64
Weight:225–250 lbs.
Height:6'2"
Yes , I recommend this product
Anonymous
Mens MT...love the fit
2 years ago
REI staff said that the men's MT in wool fit like MT in their synthetic, so I picked one up during Anniversary Sale. At 5-11 and 175# this fit is a little long in the sleeves and torso length...but that is my preference. The fabric is snug and stretchy thru 40" chest and 34" waist. Perfection for a base layer! It will never creep up during reaching or stretching. My 1st foray into wool in the backcountry since the 1980's...durability test pending.
Marie
Portland, OR
Favorite shirt
2 years ago
This is my husband’s favorite shirt. He has enough to wear one every day. He is skinny with long arms and the tall medium fits perfectly. We only wish that it came in colors other than black.
Weight:125–150 lbs.
Height:6'0"
Yes , I recommend this product
Matt
Great base layer for 35-45 degree weather
3 years ago
I wore this for several days in Yellowstone, doing some 3-11 mile hikes, with temperatures around 35F - 45F. It's a very comfortable, warm but not too warm, versatile base layer. It even did fine keeping me warm on warmer camp evenings (higher 40s.)
Height:5'11"
Age:25–34
Weight:150–175 lbs.
northwestpassage
Eastern Washington
Perfect base layer
2 years ago
Fantastic fit and finish. Merino feels cool to the touch but insulates so we’ll. Perfect sleeve & torso length. Planning to buy a second one. XL Tall
Height:6'5"
Age:45–54
Weight:225–250 lbs.
Yes , I recommend this product
zkulstad
Boston
amazing
2 years ago
This is unironically the best piece of clothing in my wardrobe. As a tall, skinny guy, it’s hard to find shirts that fit just right, but this quarter zip fits perfectly. Also great for winter hikes, I wear it every time I hike in the White Mountains. I only wish there were more colors so I could buy another.
Height:6'3"
Age:18–24
Weight:150–175 lbs.
Yes , I recommend this product
Don
OK
perfect but tall is not super tall
7 months ago
Sturdy, warm, comfortable, incredible stitching, great fit, best top ever, only issue is the Tall is not quite super Tall enough for my odd body shape, could use another two inches down the back. Should be fine for most people though.
Height:6'1"
Age:45–54
Weight:250–275 lbs.
Yes , I recommend this product
Vandergrift44
Bethany Beach
Great fit
3 years ago
This has an excellent fit and feel. Definitely worth the money. I am buying another one.
Age:55–64
Weight:250–275 lbs.
Height:6'4"
Yes , I recommend this product
Jim
1 year ago
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