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Size chart

Sizing notes

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.

Reviews

Rated 5 out of 5 by from I wear this vest at least 4 days a week. I bought this vest as a test. To see if the vest craze was actually up to the hype. (Wasn’t sure if a down jacket without sleeves would really make sense.) I’m really glad I bought it. I’ve had it for just over a month now and I haven’t really found a problem with it yet. As the titles says, I wear it quite frequently. I typically wear it over a mid weight layer to break the wind, or take off the chill. It’s perfect. I’ve also worn it under a shell in the 40 degree range to help with breathabikity and warmth. I’ve worn this vest hiking, climbing, in the office, and out for drinks. So it’s versatility is also pretty great. Sizing seems good. It’s super lightweight. Weather resistant. Love the matte black look. God job REI.
Date published: 2018-01-18
Rated 4 out of 5 by from Nice vest—runs large I'm not sure what the fill weight of the vest is, but the Primaloft Silver Active is a nice fill that lives up to its promises of breathability. The vest is fairly windproof as well, which makes it a nice layer over a fleece or flannel. I'm fairly skinny, at 6'1" and 160 lbs, and I found the medium to be a little larger than I'd like, so I'll be exchanging it for a small.
Date published: 2017-04-29
Rated 4 out of 5 by from Nice vest; fits one size smaller It’s a light vest for chilly days. Great for wearing inside by itself and also layers nicely under a jacket for added warmth when outside. Fairly simple vest with some extras, like a chest pocket and drawcord at the waist. Not sure it’s worth full price, but it was a steal at half off. Important to note that it fits about one size smaller than other REI vests; I usually wear a medium but exchanged it for a small.
Date published: 2018-01-13
Rated 5 out of 5 by from light weight but very warm Warm vest without all the bulk of the “puffy” vest types - great to wear over sweater or a great layering piece. Sizing is spot on, and has several nice features like a zippered chest pocket. My only complain is the REI logo on the chest crest is too large and needs to be more discrete. I would recommend to anyone!
Date published: 2018-01-28
Rated 5 out of 5 by from For Work & Fun This is my new go-to vest. No, it's not a rain jacket, but it does repel water long enough for me to find cover. The hand pockets are deep and the chest pocket cradles my smart phone perfectly. Esthetically appropriate for work or the trail.
Date published: 2017-09-22
Rated 4 out of 5 by from Light but warm Nice light, but warm vest. A great under garment!!
Date published: 2018-02-14
Rated 5 out of 5 by from best vest I bought this vest a few days ago right before leaving for a snowboarding trip. It quickly became my favorite layering piece. It was perfect under my hard shell or soft shell.
Date published: 2018-01-21
Rated 5 out of 5 by from Works for me! The light weight of this vest is a positive, gave it to my son, trying to buy another on!
Date published: 2017-11-24
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Questions & Answers

How much does the vest actually weigh?

Asked by: RobR
​This vest weighs approximately 12 ounces.
Answered by: REIservice
Date published: 2018-01-30

Are there any interior pockets?

Asked by: Afinney
​No, this vest does not have any interior pockets.
Answered by: REIservice
Date published: 2017-10-23

Does any know the level of breathability (cfm)? Or quantity of insulation (60g?)? How similar is Activator SI Vest to the Patagonia Nano-Air® Vest?

Asked by: Parker
​Unfortunately, information the level of breathability and insulation quantity is not available. These vests are very similar in design. Both are stretchy, synthetic vests that offer great warmth.
Answered by: REIservice
Date published: 2018-01-30

Are there any inner side pockets?

Asked by: Peter
​​No, this vest does not have any interior pockets.
Answered by: REIservice
Date published: 2018-01-04

How windpfoof is this vest?

Asked by: Paul
This vest offers protection against mild gusts, but you'll feel wind enter the garment through the arm holes.
Answered by: REIservice
Date published: 2018-02-16
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