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Size chart

Sizing notes

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 and ¾ inch shorter in total rise.
TALL: tall sizes are 3 inches longer in inseam and 1 inch longer in total rise.


Rated 5 out of 5 by from Great quality, great fit. Got this shirt a few months ago and have used it every week since then. I use it at the gym and have put A LOT of sweat into it. It dries really fast afterwards. I've also put this in the wash after every use, and it's the one shirt that hasn't shrunk yet, although I'm careful not to put it in the dryer just to be safe. In terms of fit, I think I'm normally a medium, although I'm sometimes a large for a looser fit. Because I was using this to work out in, I played it safe and bought the large. It was a perfect, loose-but-not-baggy fit on me. I have big shoulders and arms. For reference, I'm 5'2", weighed ~155-158 when I bought it, now I'm around ~145. It does look a little bigger on me now, but it's still my favorite to work out in.
Date published: 2016-07-15
Rated 2 out of 5 by from POOR FIT! Beautiful fabric and colors! I tried this on yesterday, lured in by the display of beautifully colored t-shirts, half-zips, and tights. The fabric and colors are amazing, but the fit is WAY off. (For reference I wear a M in the Patagonia Forerunner top and in most yoga and running shirts.) The sleeves were quite restrictive and the shoulders too narrow (and I have pretty narrow shoulders). The fit from the chest down was great - loose but not baggy. REI, please redesign this shirt!!! Keep the colors and the fabric, but figure out the fit. If it had fit, I would have bought multiples!
Date published: 2015-08-03
Rated 5 out of 5 by from My new favorite hiking shirt I bought this shirt a while back and have hiked in it a few times. It's perfect for the changeable coastal weather on the trails. The wicking is fantastic. I can work up a good sweat heading uphill and end up with my skin dry when I'm on a ridge in wind and fog without getting cold from dampness. I like that it's a decent length and tucks into pants if desired. The form fitting shape and colors are attractive so you can wear this shirt into town afterword without looking like a grubby hiker. I agree with other reviewers that the cut is narrow. I'm 5'3" with a small build so the medium size fits me fine, but I can see how someone with a larger build might find this shirt constricting. The material is sheer so I bought the turquoise and lavender heather colors that aren't see-through. I think the solid non-heathered colors could be see-through.
Date published: 2015-08-01
Rated 3 out of 5 by from Great price point - fit is off In terms of functionality, this is a great tech tee. It is light, comfortable, wicks moisture well and dries quickly. It is also significantly cheaper than other tech tees on the market. However, I find the shoulders are cut too narrowly. The rest of the fit is fine (I purchased a small), but the shoulders are slightly constricting.
Date published: 2015-03-23
Rated 5 out of 5 by from Great Shirt! This is a great shirt. The material is nice and thick (I got a heathered shirt, not sure if the solid ones are different), super soft, and is a great length for my long torso body. I am usually an xs, but I ordered a s because many reviews said that the shirt was tight, and really small. I didn't find this to be the case at all. While the s fits okay, and I'll keep it, I could have and should have ordered the xs. For me at least, this shirt seems to fit true to size, despite what others have said.
Date published: 2016-02-19
Rated 5 out of 5 by from best all-purpose shirt ever !! i own 7 of these shirts (in grey, black, purple, pink). the fit is flattering, the fabric feels crisp and smooth after many washes, and they are very versatile. i wear the grey and black ones to work, and the other colors to run/hike/work out/sleep. i'll likely buy several more. (for sizing purposes: i am 5'4", 130 lbs, and the medium fits me well.)
Date published: 2015-08-19
Rated 3 out of 5 by from Great fabric poor fit I bought 4 of these for a trip to the Amazonian rainforest. They had great ventilation, which was my first concern. They prevented chafing in my armpits. However, the shoulders were too narrow, so the shirt rode really high and baggy around my neck. The shirt is designed for people with small chests, so if you are a well-endowed lady I would go a size up. The shirt was baggy around my neck and waist, tight around the chest and hips. I will be wearing these only on field expeditions because of the poor fit.
Date published: 2016-11-28
Rated 5 out of 5 by from Just Right! This shirt is a good fit and weight for working out or just wearing around as a casual t-shirt. It has a longer length that I especially like. It's not too baggy, nor too tight. Great colors. Just right!
Date published: 2015-03-22
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Questions & Answers

Is it shared antimicrobial? In other words, does it smell bad when you sweat in it?

Asked by: Jjhall
This polyester shirt will not conceal odor as well as other product fabrics might.
Answered by: REIservice
Date published: 2017-10-09

How much does this shirt weigh?

Asked by: Cadiebear
This shirt weighs 4.3 oz.
Answered by: REIservice
Date published: 2017-03-03

What is the spf?

Asked by: NOLA Nancy
The Co-Op Women's Tech T-Shirt has not been given a UPF rating.
Answered by: REIservice
Date published: 2016-06-13

Is this shirt 100% polyester or is it a polyester blend?

Asked by: Emily007
The fabric is 100% polyester.
Answered by: REIservice
Date published: 2015-09-20

Is this shirt mad of 100% polyester or is it made of a polyester blend?

Asked by: Emily007
The Co-Op Tech T-Shirt is 100% polyester.
Answered by: REIservice
Date published: 2015-09-20
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