After using the REI Co-op 650 Down Jacket on real hiking and backpacking trips, I think it gets the balance between weight, warmth, and price very well. It is lightweight and easy to carry in my backpack without thinking much about the extra weight. It provides enough insulation, particularly during slower sections, breaks, and around camp.
What I like most is its simplicity. There is no bulky construction or unnecessary feature set. It works well as a straightforward insulating layer that I can pull out when I need warmth and pack away again when I start generating more body heat. It’s also decent-looking, so you can wear it everywhere.
Its main limitation is that this is not a high-warmth technical down jacket. The hoodless design and relatively light insulation make it better suited to three-season hiking and backpacking. I mostly use it during general cool weather rather than in seriously cold conditions.
After the hiking and backpacking use I’ve put it through, I would buy it again. For the price, I think the REI 650 is one of those jackets that delivers the performance most hikers actually need without making them pay for premium-down performance they may not need.
REI 650 Down Jacket at a Glance
The REI 650 is a deliberately simple down jacket. REI keeps the weight and price relatively low by using 650-fill down, a hoodless design, and a fairly minimal feature set, while still giving it useful hiking features such as a hem drawcord and four pockets.
| Specification | REI Co-op 650 Down Jacket |
|---|---|
| Price | $129 |
| Insulation | 650-fill-power down |
| Weight | 10.9 oz / 309 g |
| Shell | 100% recycled ripstop nylon |
| Weather treatment | PFAS-free DWR |
| Hood | No |
| Pockets | 2 zippered hand + 2 interior drop-in |
| Hem | Adjustable drawcord |
| Back length | 28.5 in. in men’s Medium |
| Best use from my testing | Three-season hiking and backpacking, cool-weather stops, camp, and layering |
What I Like
- Excellent weight-to-value balance. On my backpacking trips, it has been light enough that carrying it as my insulation layer never feels like an unnecessary burden.
- Useful warmth without excessive bulk. I have found it particularly practical when temperatures drop during stops, slower hiking, and around camp.
- Simple and easy to layer. The uncomplicated hoodless design works well as part of a clothing system rather than trying to be an all-in-one winter jacket.
- Practical storage. The two hand pockets plus large interior drop pockets give me considerably more usable storage than the minimal design initially suggests.
What I Don’t Like
- Warmth has a clear ceiling. I would not choose it as my only insulation for seriously cold conditions; this is a lighter three-season puffy rather than a high-loft winter jacket.
- No hood. I like the cleaner layering, but when temperatures fall or wind picks up, I need separate head protection or a hood from another layer.
How I Tested the REI 650 Down Jacket
I tested the REI Co-op 650 Down Jacket on real hiking and backpacking trips, not just around town or indoors. I used it both while moving and during lower-output periods such as breaks, cold starts, and time around camp because those situations tell me very different things about a down jacket.
My testing covered temperatures from approximately 63°F to 30°F, including calm conditions and exposed wind. I wore it over a base layer, over a fleece/midlayer, and beneath my REI Rainier rain jacket to see how well it worked as part of my complete hiking layering system.
I also wore it with both a daypack and a backpacking pack, paying attention to shoulder compression, mobility, heat buildup, pocket access, and whether the jacket shifted under the straps.
For packability, I weighed my size Medium jacket at around 11.0 ounces. I also tested whether this current version actually packs into its own pocket.
I exposed it to light moisture, but I did not deliberately soak the down insulation. I also won’t claim performance below the coldest temperature I actually tested because that would no longer be firsthand evidence. I tested the current REI Co-op 650 Down Jacket – Men’s, not the older 650 Down Jacket 2.0 that still appears in many reviews and search results. For more on how I separate firsthand testing from researched product information, see how I test and review hiking gear.
Hands-On Testing and Performance
Warmth: How Warm Is the REI 650 Down Jacket?
The REI 650 is a light-to-moderate insulation layer rather than an expedition-style down jacket. From my hiking and backpacking use, I found it most useful when I stopped generating as much body heat. During breaks, cold starts, slower sections, and around camp, the experience was excellent.
While actively hiking uphill, I could become warm enough that I did not need the jacket for long. Standing still was very different.
I tested it with the REI Co-op Sahara T-Shirt and my other hiking shirts underneath, and also with a midlayer when I wanted more insulation. I also layered my REI Rainier rain jacket over it, which created a much more protective system when wind or weather became a factor.
The lowest temperature I personally used the REI 650 in was approximately 30°F, where I was comfortable with my T-shirt under it.
Warmth changes considerably with wind, activity level, metabolism, layers, and how long you remain stationary.
Fit and Sizing
I tested the REI 650 Down Jacket in men’s Medium, and on my 100 cm / 39.4 in chest it fits true to size. The fit feels comfortable rather than tight, with enough room over a T-shirt or lightweight base layer without feeling excessively loose or boxy.
The Medium fits comfortably over a T-shirt or lightweight base layer, which is how I expect to use the jacket most often while hiking and backpacking. I do not need to size up for that type of layering.
I also tested the REI 650 as part of a fuller layering system, including wearing a fleece underneath and my REI Rainier rain jacket over it. That combination is especially useful because the 650 provides insulation while the Rainier adds wind and rain protection.
The fit also gives me enough freedom through the shoulders and arms for normal hiking movement. I checked this by raising my arms, reaching forward, and wearing a backpack, rather than judging the fit only while standing still.
So for someone with a build similar to mine, I would consider the Medium true to size rather than sizing down simply because some owner reviews describe the jacket as roomy.
Comfort and Mobility
The REI 650 feels surprisingly soft and comfortable for such a simple down jacket. I wore mine over short-sleeve T-shirts as well as base layers, and the lining feels smooth and soft against bare skin. I could not feel an irritating inner sleeve seam during normal wear.
When fully zipped, the collar does touch my neck and lower chin, but comfortably rather than abrasively. The elastic cuffs also feel soft around my wrists. They provide a reasonable seal. There can be a slight gap depending on your wrist size rather than the cuffs clamping tightly around you.
Mobility has been equally good. When I raise my arms overhead or reach forward, the hem generally stays low enough that it doesn’t expose my waist. I haven’t felt any restriction through the shoulders.
I noticed the down baffles compress easily beneath backpack shoulder straps, but that hasn’t caused uncomfortable pressure, bunching, or restricted movement.
Weight and Packability
REI lists the men’s 650 Down Jacket at 10.9 oz, and my size Medium weighed approximately 11 oz on my scale. In practice, it is light enough that I have no problem carrying it as my insulation layer on hiking and backpacking trips.
It also compresses reasonably well for a 650-fill jacket, although I would not describe the packed size as exceptionally small. Higher-fill-power premium jackets can generally achieve a better warmth-to-weight and warmth-to-packed-volume ratio, so there is still a trade-off with the REI 650’s lower price.
I haven’t recorded exact compressed dimensions yet, so I won’t estimate them from a photo. What I can confirm is that it packs down small enough to be practical inside my backpack without requiring a separate stuff sack.
Does the REI 650 Pack Into Its Own Pocket? Yes, my current REI 650 packs into its own left-hand pocket. I physically tested my size Medium jacket rather than relying on older product descriptions. I was able to stuff the entire jacket into the left pocket and close it into a self-contained bundle.
The trade-off is compression. Once packed into the pocket, it forms a fairly chunky bundle rather than an especially tight package. It works well for keeping the jacket contained, but if minimizing every inch of pack space were my priority, I wouldn’t consider this a standout ultralight puffy.
Wind Resistance
The REI 650 does a good job of cutting ordinary trail wind for such a lightweight down jacket. But I still see it as insulation rather than a replacement for a proper wind or rain shell.
In a light breeze, the thick baffles effectively blocked the moving air from cutting into my core. It kept the internal microclimate completely stable while I sat resting. The higher collar helps around my neck when fully zipped, and as I noted earlier, it touches my neck comfortably rather than rubbing.
The cuffs are a little less sealed. On my wrists, they provide a soft closure, but a slight gap can remain depending on wrist size. So, that is one place where cold air can potentially enter. Tightening the drawcord reduces the opening around the waist. I noted that it helped prevent wind from working its way underneath the jacket.
In stronger or more exposed wind, the moving air began to penetrate the sewn-through seams and drafty cuff openings. It rapidly stripped away the lofted heat inside. This is where I would rather add my base layer under it. I also tried the REI Rainier shell over the 650 rather than expecting the down jacket to do everything.
Durability and Feather Leakage
The REI 650 uses a lightweight ripstop nylon shell, so I specifically checked the areas where lightweight down jackets can fail: feather leakage, stitching, snags, cuffs, zippers, and abrasion beneath backpack straps. After using mine on hiking and backpacking trips, I wouldn’t describe it as a rugged outer layer, but neither has it given me reason to treat it as unusually fragile.
I have seen occasional feather leakage on my jacket. The photos above show small pieces of down or feather working through around the stitched baffle areas.
So far, the leakage has been occasional rather than constant. I haven’t seen anything that suggests a baffle is opening or losing a meaningful amount of insulation. This is still something I will keep watching because feather shedding is one of the recurring issues reported by some REI 650 owners.
The shell feels light rather than burly, which makes sense for an approximately 11 oz jacket. The ripstop weave should help keep a small snag from turning into a larger tear. I would still avoid wearing it as my outer layer through thorny brush or against rough rock.
After my trips, I specifically inspect the baffle stitching, pocket seams, underarms, cuffs, collar, and hem. So far, the stitching looks fine, even around the pocket area, which I frequently use. I also inspect the shoulders and upper back where my pack straps sit. The down baffles compress easily under load, but compression alone isn’t damage.
Breathability
The REI 650 makes more sense to me as insulation for cold starts, easier hiking, breaks, and camp than as a jacket I would leave zipped up during sustained uphill climbing. During uphill hiking and brisk walks, I noted noticeable heat buildup.
There are no dedicated ventilation features. The main way to dump heat is simply to open the front zipper. That’s what I usually do during high-effort hiking trail sections. The relatively relaxed fit and hoodless design allow a little more heat to escape than a tighter, hooded puffy.
For my use, that reinforces the role I already give it: carry it while working hard, then put it on when my output drops. I wouldn’t choose it as my primary active-insulation layer for continuous steep climbing.
REI 650 Down Jacket vs More Expensive Down Jackets
The REI 650’s strongest argument isn’t that it outperforms premium down jackets. It’s that many hikers may not need to pay premium-jacket prices.
After hiking and backpacking with mine, I think the REI 650 already covers the basics very well. It’s great for three-season insulation, at roughly 11 oz in my size Medium. It’s also great for layering versatility, reasonable packability, and a simple design that works on the trail.
What you generally gain by spending more is higher-fill-power down and better warmth-to-weight efficiency. What you don’t automatically get is a jacket that’s twice as useful just because it costs twice as much.
I paid $69.93 (bought during a sale) for the REI 650, and I think the REI 650’s performance-to-cost ratio is exceptionally difficult to argue with. Even at its current $129 MSRP, its value proposition remains very different from premium jackets costing well over $250.
I have not yet tested the Patagonia Down Sweater, so this is a researched comparison rather than a firsthand verdict.
The current hoodless Patagonia Down Sweater costs $289, uses 800-fill-power RDS down, and weighs 13 oz. Patagonia’s 800-fill down is more efficient insulation. Independent long-term testers consistently regard the Down Sweater as the more premium, warmer, and more refined jacket.
But the price difference is substantial: $160 at the current MSRP. And this is exactly the question hikers repeatedly raise in owner discussions: Is that extra warmth worth roughly twice the money?
For now, my conclusion is simple: if value matters most, I’d start with the REI 650. If warmth-to-weight, long-term refinement, and premium construction matter more than price, the Patagonia becomes much easier to justify.
Who Should Buy the REI 650 Down Jacket?
I think the REI 650 is best for hikers and backpackers who want a lightweight, affordable insulation layer for three-season and shoulder-season use. It works especially well for cold starts, breaks, camp, travel, and everyday wear. I like that the hoodless design layers cleanly under a rain shell. If value matters more to you than the best warmth-to-weight ratio, this jacket is actually worth it. In my experience, it delivers enough warmth and packability. For most of my normal hiking and backpacking, I did not feel the need to buy a premium jacket. For the rest of the clothing and safety gear I normally carry alongside an insulation layer like this, see my day hiking checklist.
I would skip it if your priorities are maximum warmth for minimum weight and very small packed volume. Or if you need to use it for technical alpine or heavy-abrasion terrain. It also isn’t the right choice if you specifically want an insulated hood built into the jacket.
If you want a practical, reasonably light puffy that covers most three-season use at a sensible price, the REI 650 is very easy to recommend. If you are building your first overnight kit, my beginner backpacking guide shows where an insulating layer fits alongside your shelter, sleep system, cooking gear, and water setup.
My Final Verdict
After using the REI Co-op 650 Down Jacket on real hiking and backpacking trips, I would buy it again. My size Medium weighs about 11 oz, so it still does not weigh me down. It provides useful warmth when my activity level drops. I also use it as a layer over a base layer, and it works particularly well beneath a rain shell as well.
I would happily take it day hiking and backpacking, especially for three-season trips. The occasional feather leakage I’ve seen is something I’ll continue monitoring. But so far, it hasn’t outweighed the jacket’s comfort, low weight, and overall value.
I would spend more if I needed better warmth-to-weight efficiency, a smaller packed size, more warmth for colder conditions, or tougher construction. For most ordinary three-season use, however, I don’t think everyone needs a premium puffy.
