Marmot 5°F Snowcrest Sleeping Bag - 600 Fill Power Down, Mummy, Long

I like this bag. The down has good loft. The material is of good quality. Features including the hood's asymetrical draw strings, and the draft collar work very well and provide excellent comfort. I am impressed by the inclusion of a large, mesh storage bad and a good quality stuff sack which compressed the bag to about a foot by 6" in diameter. I've slept in this bag over below freezing nights and indoors at a friend's house. The bag worked great under both temperature ranges.

I have been searching for a bag that is 90 inches and I finally found it. Lots of room and well made bag.

The bag appears to be a top quality 600 fill power bag; however as it is rated to 5 degrees F is something of a stretch.Even given the adding of the 20 degrees that is a thum nail approach to warmth in a bag, it still seemed a little thin. Meaning; I bought it to augment my older 600 fill power down bag and in spite of putting it in the dryer with tennis balls and fluffing it to the max., it still clearly would not "fluff" to meet a sub freezing night.( it never fluffed to get to the older bags apparant insulation quality). Unless of course you dressed in full out door attire, I would not want to face the Eagle Cap in October in that bag.. I am actually returning it in favor of a 800 fill power down bag. Its my mistake , not the bags. Sierra shipped it as promised, on time and for what it is; it looks to be a great bag!

It is warm and roomy

This was my first winter bag and first mummy bag. This is also lighter by a few pounds than my aging 3 season down bag with a tight knit cotton (almost canvas like) exterior.
I've just had my chance to try it out this weekend when the weather dipped to the mid teens at night, and an inch dusting of snow was predicted.
My son & I went out to his platform treehouse, each armed with a self inflating air mattress, and our respective bags.
He used double bags, and multiple layers of clothes along with gloves and a hat, and ended up with a nice ice crust in the AM - and smiles.
I wanted to push the envelope of what this bag could do so I wore some thick winter wool socks, jeans and a midweight flannel and topped it with a smartwool beanie (as I would if I were backapacking)
It was a bit difficult to get the bag sorted at first. I tried to use a pillow from the house, but this made the hood too bulky so that ended up on the outside nearby. I found that once it cinched up it was more comfortable than I expected. While it dipped to perhaps 17 overnight, I was ok and pleasingly warm throughout. I had problems sleeping on my back as the falling snow tickled my face irritatingly until I flipped onto my side, and was just as comfortable. I noticed as others had, that the larger the space and air pocket the more that particular area tends to feel slightly colder - so size this appropriately. My relatively thin clothes probably made me more sensitive to this, but that was my intent.
I am 6ft 2, and 185 pounds and the long size fit me very well with ample room at the feet without being too much.

I had never used a mummy bag before my purchase, so I'm sure some of my issues were simply getting used to things such as centering the hood, and awkwardly tightning the closures while striving to keep my hands inside the bag.

All in all a great bag. My main beef was the zipper tended to snag as it came to the top, but this may have been due to positioning or experience. This seems to be appropriately rated, though I'm not sure I'd use it for temps lower than 5 without some serious layering. Get this with a coupon and it is a steal. Great color too :)