I purchased this jacket for layering and as with all of their gear, and how it fits me, ordered 1 size larger. This is a great jacket and very quite and warm however I am giving only 3 stars because the sleeves are cut weird and it does not layer well over a shirt or fanatic hoody and under the stratus jacket. Also due to its very soft inside and exterior fabrics, combined with the tight sleeves, it is really hard to take off when layering and you end up peeling the sleeves inside out. This is again a great quality Jacket that is really warm and quite. Its fit however is not practical for what it is meant to do. It would be fine by itself as single outer layer.

This jacket is excellent as far as warmth and quality goes but--like the Stratus that I also have a review on--it runs small. Do not get your regular size, unless you're lucky you will be sending it back. I love the gear and will continue to buy and use it but the sizing is off by 1. L is XL, XL is XXL. Trust.

Great jacket as most Sitka items are and performs as they say it will. Only reason it’s not four, is the fit is strange. I wear a med/ large in all my other gear, even Sitka products, and this jacket is tight in the arms and through the shoulders/ chest. Works with just a t-shirt as a base, but anything more and the jacket becomes uncomfortable and does not function. Makes layering a pain. Have a large, Am going to get another in an XL.

I really like this jacket. Jacket is super warm for the weight. Can easily be used for layering. Only thing is like to see different with this jacket is the addition of a hood.

Quiet durable and warm. It is very light and provides a lot of protection from the elements. My system includes the Core Lightweight Hoody as the next to skin, Equinox, Celcius, or Stratus Jacket. For any serious hunter who is even thinking about Sitka Gear, I say just try it. I purchased the Equinox jacket and pants. I sat for 1 hunt. When I got home I sold all my other camo. There is nothing else like it.

Love this piece by Sitka. It is truly the "Puffy Jacket" as advertised, feels like the inside of a sleeping bag. Hunting in Central Texas the temps can change from 50 degrees to 21 and windy in one day. This jacket is great for that range. I purchased the Fanatic Vest to throw over the Celsius to deal with the wind and colder temps. Allows me to cut down on bulk and makes it easier to draw my bow. Only issue with the jacket is the forearms are snug and made me go up a size. I am 6'4 and athletic build and wear an XL in most everything. I had to go up to XXL to fit my arms into sleeves. I couldn't wear this jacket as a mid layer, but throwing the vest over it allows me to make it without needing anything else. Overall very comfortable jacket, I catch myself wearing it when I am not hunting.

Amazing piece of gear, very warm and removes moisture well. medium is a little tight under medium fanatic, maybe try a large if you plan on using it as layering.

A little small

Loved this jacket! I wore it all year. Super quiet and secures body heat extremely well. I used it in below freezing temps and 50 degrees. Overall great jacket.

It was 18 degrees with 10-15 mph winds out of the NE and 1-2 inches an hour snowfall this morning here on the Delmarva. That's as winter as it gets here, so I wore heavyweight core bottoms and top, a merino bottom and Traverse Zip T for mid layers, Fanatic Bibs, Celsius Jacket, and Fanatic Vest. Walking out to my stand location, I got about 300 yards and had to shed the Vest and Jacket. Way, way to hot to be walking around. Once at my tree, I stacked back up, ascended with my climber, and settled in. Cozy warm for 5 hours. Until today, I've been using the Celsius with the Jetstream Lite Vest since Thanksgiving and been fine. Today was the first time I deployed it with the Fanatic Vest. No doubt that this is my deep winter combo. Just crazy warm and comfy.

Just finished my final hunt of the Michigan season, and I found myself wearing the Celsius jacket as my outer since it bottomed out at 30 degrees. Couldn't have been happier with it keeping me warm and cutting the wind (not necessarily designed to cut the wind, but give it to Sitka to get it done anyway). Only wish there were additional inner pockets for when this jacket is being utilized as an outer.

By far the best coat $179 can buy. If you're looking for a coat to keep you out all day, but compact enough to pack in this is it.

Very warm especially relative to its minimal bulk. Makes an excellent insulation piece, but most of the time I find myself wearing it on it's own with the Core heavyweight zip-t underneath. Awesome jacket!

Disclaimer: I am a member of the Sitka SWAT team, but feel the need to share my two cents on the Celsius jacket. Quite frankly, I love it. It doesn't have a lot of pockets so most will find it less than ideal for an outer layer, but worn under one of Sitka's many outstanding vests will solve that issue. I'm a traditional bowhunter and have worn it on the outside and also as insulation under another Sitka outer garment; either way, it is quiet and also layers very well without feeling bulky. The outer surface is kind of "slippery" which really helps as a layering garment. Trust me, you'll also find yourself wanting to wear this to work in the winter. P.S. Referencing Jordan's review--it is not a rainproof garment nor advertised as such. That kind of weather is covered by Sitka's raingear.

Extremely soft, quiet, and warm. It is everything you would want from an insulation jacket. The primaloft allows for a great barrier from you to the elements allowing you to stay warm and dry!

Bought this jacket right before spring started and have yet to hunt in it yet. Looking forward to using it for spring turkey and later on in the fall for Blacktails and Roosevelts elk seeing as I live in Western Oregon. Only problem I see is I don't know how it'll hold up in Oregon's constant rainy weather. Other than that it's s great jacket!

Superb light jacket for a bow hunter. Quiet, pretty warm, nice fit and freedom of movement is exceptional. I did not wear this as much as I would have liked do to warmer weather this year, but it is one of my favorite new pieces.

Extremely soft and quiet and comfortable. I really like this jacket. I don't ever expect to use it as an insulator because it is really warm. It will go over the stratus vest and fanatic hoody for me. Sleeves are a little tight but I still love it.

Perfect all season whitetail jacket as it works great alone or as a base layer. Wore it all season with no problems. Agree the forearms are tight but it does help keep the wind out.

It is a good jacket for what it is but I prefer vest as a bow hunter. For some reason they did away with the fanatic vest which had both windstopper and primaloft so I decided to go with this and a stratus vest. The problem with this jacket is that it is very tight on the arms. I am a big guy and former college athlete. I can't layer under it due to it being very tight around my wrist, forearms, biceps and shoulders. No way I can pull a bow with it. I will be selling it and just using my fanatic jacket when it gets really cold in Forrest 2 and keeping my fanatic vest in the more green Forrest pattern. (which as a bow hunter was perfect) I could wear the fanatic vest down into the 20's with an expedition weight merino and a traverse zip (which they also did away with).

Great jacket and very warm! Excellent for sitting in my tree stand or in the blind. My only complaint is the sleeves are narrow around the forearms. I am very athletic but at 6' and 245# I have a very hard time getting a XXL over anything but a very thin base layer due to the forearms. Its even hard to get over my watch and my release is almost impossible. I will likely try a different jacket for next season. However if you don't have Popeye forearms its a great choice.

I do not normally write reviews of the products I purchase but, after buying this new jacket, I felt like I had to give credit where credit is due. I now am outfitted with a complete Sitka system and this jacket was a welcomed addition. As soon as you put it on you can feel the difference. Its warm, quiet, its not binding (huge plus), you can layer under it for the earlier season sits and over it as the season heads into late November/early December. Moving through thick woods the material is silent unlike most of the junk you can buy out there. When you have to move to get into position for a close encounter (the case this year for me, New Hampshire 8 Pt)you don't have that crinkle noise you get out of other jackets, or the scraping noise as your back rubs against the tree. If you are one of those hunters that has been visiting the Sitka sight and building a system but haven't pulled the trigger yet, do it, you will not be disappointed. Thank you Sitka!

I second Gabe above...just picked up this jacket this past wkend and I must say this is the best jacket I now own and I have a bunch!! I bowhunt exclusivly and this jacket is unbelievably comfortable and super soft and quiet. Although it has athletic fit I was able to put on two base layers and not feel binded. The camo pattern is awesome as well and will blend in anywhere. Also picked up the new Status Pant to go with it. keep up the good work Sitka......

I've been looking at this jacket on Sitka's website since it came out and finally decided on getting it yesterday. I duck hunt and bow hunt a lot and was looking for a good insulating later that I could wear in the tree stand, as well as under my delta wading jacket when I duck hunt and this jacket seems like it is going to be perfect. I haven't had a chance to wear it due to the 100+ degree weather in Louisiana right now(and pretty much everywhere) but I like it so much already that I've been wearing it around the house. I know its going to keep me warm in the duck blind, as well as be very warm and quiet as an outer layer when I'm 30 feet up a tree this coming January. The jacket is different than I thought it would be by just looking at it online so I suggest going to look at it in person. But the biggest thing that got me was the price tag that comes with this warm piece of equipment, very reasonable and an all around great buy in my opinion. Good job Sitka!