I have to respectfully disagree with the review below. I am 6'3", 185 and wear a large in this jacket. It fits me perfectly (and I like my jackets/technical clothing in an athletic fit). I do agree that it bunches up someone when you sit down, but the same thing happens with the Patagonia Down Sweater and comparable OR jacket. To me, this fit exactly the same as the Patagonia Down Sweater - the only difference being that the Patagonia has smaller down pockets (see pictures of both). I frankly went with Marmot b/c (in my experience) I have had better luck with durability and better down products. You really can't go wrong with either, but I did want to offer my opinion that this jacket fit me correctly and I am virtually the same size as the reviewer above.

I tried on a number of similar jackets from including the Patagonia Down Sweater and a few different North Face jackets. Looking for an 800 down this was the best of the the lot. I am 6'4" 230 with an athletic build and the XL fit perfectly to be used under a rain shell. Plenty of room to move my arms in every direction. The collar is also great being extended up a couple inches but not intrusive.

The only problem was when I got mine in the mail there was already a very small hole where down was popping through. This was much larger than a pin hole so not sure what happened but this worried me enough to give only 4 stars. Hopefully the exchanged new one will be good.

I've worn them all: Patagonia, TNF, Mont-Bell, and the Marmot is simply the best. Perfect weight and the finish is NOT trash baggy like others. The fit is great as long as you know your size. Marmot runs a hair big. I'm an althletic 6'2" at 205lbs and the L fits me perfect. If your looking for a skin tight fitted look like my wife does go with the Patagonia. If you want a Man's jacket, Marmot is for you!

What it is, is a high quality, lightweight insulating layer that's suitable for knocking around in, or taking up a small area in a pack for when it's needed. And when that time comes, it does the job nicely. Size med. fits my 5'-11"/145lb body just right that I can get a Polartec 300 fleece layer under. Someone else my size would probably be able to make do with a small, but I wanted something to throw on after a day of hiking/skiing to a campsite. The collar doesn't cut off oxygen, nor let in cold air. Nice inside pockets suitable for bottle(s) and Cliff Bars from freezing aren't usually mentioned, but there's one on each side. It's a great value considering the price & the quality of construction & materials. I wouldn't hesitate to depend on it at -10F with a decent shell and some R1 fleece underneath.
For a lightweight insulating layer, at even $50-$75 more, that'd be a keeper.

I'll make this short and sweet. Marmot plus lifetime warranty, to buy anything else for this particular style of jacket is dumb. North Face's down equivalent approx. $230.00 - Marmots Zeus approx $150.00. Why the difference because North Face is more trendy and mainstream. Don't be fooled and get the lifetime warranty. Unless your just a poser then buy North Face. But from growing up in Wyoming, spending a few years living in Jackson Hole, WY and living at the base of Longs Peak, Colorado. I recommend Marmot Zeus all the way.

I am between 6'3"-4" and weigh like 200 pounds. Depending on the brand I wear between a L and an XL (for those of you who are tall you can understand) often times the L is too short and the XL is too big in the chest. This jacket is great. It is light weight, warm, and it does not make one look like a marshmallow... It is kinda fitted. All you could want from a down coat. My one gripe would be that some down comes out, although I do not know what is normal for down leakage...(let me know what is norm) I like it because it is not shiny like many other comparable down jackets. I am a NOLS alumni and only wish that I had this coat on my last trip. Get it

Forgot to add that I got the large and it worked/fit great.

I tested it under a shell with nice wool layers. Skiing at 17 degrees was too hot and had to take it off. When it got colder and windier and this jacket performed better than any other insulation layer I've used.

A previous commenter said that some baffles have little/no down. This is obviously by design to let heat out the underarms. The jacket is functional at sub zero temps with proper layering, you don't want it any hotter if you are going be active.

The Zeus is a nice lightweight down jacket that takes up minimal room in your pack. The stitching is done well and the baffles are nice and lofty. I just got it so I can't say much about how warm it really is... just that it's too warm to wear in southeast Michigan in August. It does loft higher than the Patagonia Down Sweater, so it should be the warmer of the two.

The two zippered handwarmer pockets are well-placed and the whole jacket will stuff into the left pocket. The waist drawcord adjusts from inside them and there are two stuff pockets on the inside of the Zeus that will fit a pair of gloves or your lunch. The wind flap behind the zipper is nice and sturdy, and the collar is a good height.

I'm 6'0" & 175 lbs and a medium fits me well without being too tight or too baggy. It fits under my Arc'teryx Beta AR just fine, too. And Gargoyle is an awesome color.

The jacket does what it supposed to do - provide light mid layer insulation. It fits well under a shell, takes little space, light. It can also be used as extra insulation in the sleeping bag if someone in your group is cold. I don't know about the 'bear gut' busyness, but in my opinion this sort of effect will always occur when you sit. This is not tight fit base layer after all.
One feature that would be nice to have (I hope Marmot folks are reading this) is the tight wrist bands.

I had a hard time determining what the "Raven" color might look like, so I called Marmot and the service rep told me that Raven is a brownish/purple. But he assured me that it was a really cool color. I got it, and he didn't lie. The color is really cool, and you wont look like every other dude on the street wearing TNF in black!

This Jacket is perfect. I tried the North Face and Patagonia down jackets on and I liked the feel and fit of this one the best. I am 5'11" 175lbs. It allows mobility while not being too bulky. The material is really smooth and soft to the touch and very comfortable which I think makes up for the lack of water resistance which is often shiny looking. Besides if its raining just wear it under your shell. I got mine for backpacking in winter and at 20 degrees it was too warm when worn with a base and midweight layer. Only had to wear it in the morning while making breakfast and at night while sitting at the campfire. Its super light and not too bulky but still thick enough to keep you warm. Plus the pocket stuff sac is really nice. The Raven color, in my opinion, is the coolest color. It looks better in person than in the picture.

This jacket is Amazing! It is a must. I can't say anything bad about it except maybe a caribener clip loop for when it is stuffed would be nice. Seriously there are no flaws to this jacket and it fits great. The Zeus is better than the Patagonia down sweater, North Face Thunder, Mountain HardWear Nitrous. Basically this is not only the best in it's class but it is the least expensive. It packs to nothing, weighs nothing. Keeps you warm and cozy when it's cold outside and yet you don't overheat in moderate temperatures either. YOU NEED THIS JACKET!

I'm about 5'8" with broad shoulders and long arms, a lot of times I have trouble finding jackets that will fit a shrimp with long arms that isn't made for a fat guy. I've been pretty pleased with my zeus though, fits great (got a medium) and it doesn't add too much bulk under my shell. And it packs into the stuff sack from my girlfriend's rain jacket pretty well when I have to through it into a pack. I'll call it a solid purchase

This jacket is much warmer than I thought it would be. It works well under a hard shell jacket, and can certainly handle the cold all by itself. The pockets are large and easy to access, and the inner pockets (the stuff pockets) are huge and can easily handle gloves and/or googles. I especially like the longer arms, and the material itself is quite nice. I would recommend this jacket to anyone who spends time outdoors.

This jacket is one of my favorites. I was originally looking at the Patagonia down sweater and found this jacket as another option. The baffels are slighly larger that patagonia which I have grown to like asthetically more than the sweater. Weighs nothing and surprisingly fits under every shell I have. It is not over bulky but yet often plenty warm solo. Just go for it. It rocks.

This jacket is pretty damn awesome! Every line makes one, and I tried on The North Face and Patagonia and decided on this one. I am 6'1'' , 175, and athletically built and it fits me solid. It is lighter than the t-shirt beneath it and definitely keeps you warm. It has seen mainly use from me walking my Bulldog on brisk LA mornings lately, but I LOVE IT!

This jacket is nearly identical to the Patagonia Down Sweater, which I tried on, but I ordered the Zeus because it was cheaper. The major difference is that the Patagonia jacket is an athletic cut, whereas the Marmot is a Beer Gut cut. There is considerable amount of extra fabric around the stomach. Walking around, I feel like Santa Clause. When you sit down, the jacket creates a large fold in front of you due to the extra material. I've never seen anything like it before. It is not made for a healthy/normal shaped male. I am 6' 180 lbs. I am returning it.

PS. I exchanged it for the Medium and it fit better in the stomach and the length was better for my arms but it was too small in the shoulders and chest. Returning this one too :(

I have another older Marmot Down Jacket that is 800 down fill and this new Zeus is maybe at most 300 down fill. Some baffels don't have any down at all just fabric. VERY DISAPPOINTED IN THIS MARMOT JACKET!!

Maybe the factory workers in China went on lunch break when this was being made a forgot to finish when they returned.