I love this jacket. It's a great alternative to a fleece (light rain and snow roll right off, stands up to light wind, dog hair doesn't congregate on the surface, etc.) for those cooler but not frigid temps in the fall/early winter here in New England. It's definitely not as warm down, so don't confuse this mid-layer jacket with a heavily insulated winter coat. I found the fit to be great - I'm a slim/average 5'8 with long limbs and a shorter torso, so sleeve length is almost always a problem for me, but the medium was a great fit for me.

I have been very pleased with this jacket! The synthetic down-like material is great--very warm, no itch or allergy worries, and it compacts nicely for packing around. The fit is great, too. Comes in a bit at the waist for a feminine look, good arm and torso length, true to size (I am 5'4", 140 pounds, and got a medium that fits perfectly). On super cold days, it also worked well to layer a heavy-weight fleece underneath. Nice full hood and soft, lined pockets. I got the cream color, which looks great and seems to clean up well so far. I love it!

I am always cold. Several years ago my boyfriend got a primaloft coat and for years I shivered in fleece while he rallied through anything. This coat is the answer to my prayers. I am 6 1 and this coat is not only long enough -- the hood fits my bongo head and tall neck comfortably. I usually buy a large, bought the XL in this and still fits slim. I've been wearing it all this frigid midwestern winter under my rain coat in lieu of a proper winter coat and its been just fine. It's so slim fitting that I wear it to work under my super fancy wool top coat to work and over my suit. I love it, love it, love. The green is flattering, a really nice shade. I found the merlot to be kind of blah, so returned it.

I just received this jacket and I love it! It is VERY lightweight, warm and soft. I was very happy with my purchase and would love to have it in another color. If you are looked for a reasonably priced, quality, warm, lightweight jacket, I would definitely consider this one.

this is a great jacket with a great fit. it's just as warm as any down jacket i have & it's much lighter & way less puffy. my only complaint is that it pills in the armpits which is a bummer. fyi- i usually wear a large, but wear an xl in this jacket. too bad there isn't a small interior pocket in it... otherwise it's nearly perfect & i'm a total gearhead!

I love this jacket. I bought the backcountry.com wool jacket last year and absolutely love that one. The Siphon is cut more or less the same (this one's a tad shorter in the back than the wool).

For a jacket that's almost paper-thin, it keeps me very warm. It's also super packable, so I can shove it in my backpack and put it on when it starts raining.

The bonus is the fabric - I was walking the other day from brunch, and I got splattered by a bird and it wiped right off!

The sizing is probably slightly smaller than true, but I love how it fits me, it's very fitted and I get compliments every time I wear it. People recognize the quality even if they may not recognize the goat - at least not just yet!

I absolutely love both my backcountry.com jackets, I alternate just so I won't neglect one!

Got one of these for my girlfriend and she wears it everywhere. At first she thought it was too light-weight but it's way warmer than she thought. She's 5'9" and athletic, medium fits her perfectly. Cute, too.

I bought this jacket in Dec. (Merlot color) but unfortunately I had to return it. I ordered a size small, and the fit was great, but the sleeves were too short for my liking. I think a medium would be better. I should mention that the Merlot color does have a red tint to it. A cute jacket and I wished it would've worked out.

I purchased this coat for myself and it caused a serious jealousy issue with the old lady. I bought her this coat in cream and she's had a smile on her face ever since. It's nice and light but yet keeps you completely warm. In her words "it's like being wrapped up in a down comforter."

I love this jacket!! I have long arms and have a hard time finding sleeves long enough. Fits perfectly! It's almost like this jacket was made for me. It's nice and light weight but warm and cozy. And I love the color- a brown/ maroon color, beautiful.

great fit. i am a xs and xs fits perfectly. warm, however not too heavy.

The selling point of this jacket: Packability. The siphon is an insulator jacket, and is meant to provide serious warmth in a clinch. Primaloft is made to be super lighweight, and rip-stop nylon is respective to that. This jacket is a spin-off of the Cloudveil Enclosure Hoody, and they are BOTH super great jackets. The Cloudveil has a bit more loft, but both are 100 g fill primaloft with nylon. This is a super all around jacket, and is quite water resistant. It is treatable with a spray on DWR anytime for care and water resistance. This jacket will suit you nicely if you dont like that puffy look. Again, this is a very successful hybrid jacket. Its meant to pack tight in your backpack on a winter trek, and to be a comfortable casual piece, and this is only possible with the primaloft. I wear the insulators ( Enclosure and Siphon) around town, and throw them under a hardshell waterproof/windproof if i want to get in the sub zero mercury. Get this jacket, or if you have muchos dineros, consider the Enclosure by Cloudveil.

I love the coat, fitted nicely. But....runs small.