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Kelty Cosmic Down +0 Sleeping Bag

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The Kelty Cosmic Down +0° sleeping bag provides exceptional warmth at a great price. It's perfect for winter backpacking and camping.

  • Soft, high-loft 550-fill-power down insulation provides exceptional warmth and light weight
  • Slant baffle construction with differential cut eliminates cold spots; inner layer is cut smaller than the outer layer to create consistent thickness of insulation
  • Ground-level side seam keeps draft tube in place, further helping prevent cold air from seeping through the zipper
  • Polyester creates a smooth yet durable shell; polyester taffeta lining breathes for comfort and feels great against skin
  • Full baffle draft collar drapes comfortably over neck and shoulders, sealing out drafts
  • Cozy hood has drawcords of differing widths at head and neck for easy identification and adjustment in the dark
  • Draft tube backing 3/4-length, 2-way, locking zipper keeps cold air from seeping through
  • Internal loops allow attachment of a sleeping bag liner, sold separately
  • Pad loops provide attachment points to keep your sleeping bag and pad together, so you needn't worry about rolling onto the cold, hard ground (straps not included)
  • Hang loops allow easy drying and storage
  • Kelty Cosmic Down +0 sleeping bag comes with a stuff sack

Imported.

Item 807900

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Kelty Cosmic Down +0 Sleeping Bag Specs
Specification
Description
Best use
Backpacking
4 degrees Fahrenheit
17 degrees Fahrenheit
0 degrees Fahrenheit
-16 degrees Celsius
3 lbs. 11 oz.
1.7 / 1.6 kilograms
Polyester
Down
550-fill down
42 / 39 ounces
Polyester taffeta
Mummy
78 inches
66 inches
Unavailable
9 x 17 inches
18 liters
Unisex
EN lower limit (rating for men)
EN comfort (rating for women)
Temperature rating (F)
Temperature rating (C)
Weight
Weight - metric
Shell
Insulation type
Fill
Fill weight
Lining
Sleeping bag shape
Fits up to (in.)
Shoulder girth (in.)
Hip girth (in.)
Stuff sack size
Stuff sack volume
Gender

Kelty Cosmic Down +0 Sleeping Bag Customer Reviews

REVIEW SNAPSHOT®

by PowerReviews
Kelty Cosmic Down +0 Sleeping Bag
 
4.2

(based on 19 reviews)

94%

of respondents would recommend this to a friend.

Pros

  • Comfortable (18)
  • Lightweight (15)
  • Warm (15)
  • Adjustable hood (13)
  • Packs small (13)

Cons

  • Not water resistant (9)
  • Zipper snags easily (6)
  • Packs too large (4)

Best Uses

  • Backpacking (16)
  • Cold conditions (12)
  • Year round (11)
  • 3 season use (9)
  • Car camping (5)
    • Reviewer Profile:
    • Avid adventurer (11), Casual/ recreational (6)
    • What Is Your Gear Style:
    • Comfort driven (11), Survivalist / minimalist (8)
    • Was this a gift?:
    • No (16)

Reviewed by 19 customers

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Displaying reviews 1-10

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4.0

Amazing bag

By backpacker Chad

from Georgia

About Me Avid Adventurer

See all my reviews

Verified Buyer
Site Member

Pros

  • Adjustable Hood
  • Comfortable
  • Durable
  • Lightweight
  • Roomy
  • Warm

Cons

  • Packs Too Large

Best Uses

  • 4 Season camping
  • Backpacking
  • Cold Conditions

Comments about Kelty Cosmic Down +0 Sleeping Bag:

Amazing bag for the money, keeps plenty warm in mid 20's but havent been able to get any colder than that so far but seems to be able to handle it with ease. Great bag for the price! Very roomy and packs fairly small and seems durable so far.

  • What Is Your Gear Style:
  • Minimalist
  • Was this a gift?:
  • No

Comment on this review

 
4.0

A great sleeping bag

By Cmiller1971

from Richardson Texas

About Me Casual/ Recreational

See all my reviews

Verified Buyer

Pros

  • Adjustable Hood
  • Comfortable
  • Durable
  • Lightweight
  • Packs Small
  • Roomy
  • Warm

Cons

    Best Uses

    • Backpacking
    • Cold Conditions

    Comments about Kelty Cosmic Down +0 Sleeping Bag:

    I used this sleeping bag from Christmas to New Years where the weather didnt get above 15 degrees at night and slept very warm and comfortable . There was a lot of room inside for me and the next days clothes. I look forward to cold weather camping now .

    • What Is Your Gear Style:
    • Comfort Driven
    • Was this a gift?:
    • No

    Comment on this review

     
    5.0

    Toasty Warm

    By BMello

    from NYC, NY

    About Me Avid Adventurer

    See all my reviews

    Verified Buyer
    Site Member

    Pros

    • Adjustable Hood
    • Comfortable
    • Packs Small
    • Roomy
    • Warm

    Cons

    • Shell Absorbs Water
    • Zipper Snags Easily

    Best Uses

    • 4 Season camping
    • Backpacking
    • Car Camping
    • Cold Conditions

    Comments about Kelty Cosmic Down +0 Sleeping Bag:

    I love this bag! Just after purchasing this Kelty bag as a replacement to a +20 bag, I went on a 4 night hiking/camping trip in upstate NY. The low temperatures for each night were respectively 20, 20, 15, 5 degrees. I was just as warm in this bag on 20degree nights as I was on the 5 degree night.

    One bit of advise that I agree with from another reviewer is that the "long" bag was a much better buy than the "regular" length. I'm 72" 210lbs and fit the "long" bag with a comfortable amount of space left for warm water bottles or extra clothes if a cold night calls for them.

    • What Is Your Gear Style:
    • Comfort Driven
    • Was this a gift?:
    • No

    Comment on this review

     
    4.0

    Kelty Cosmic Down

    By Carbivore

    from Lyncburg, va

    About Me Avid Adventurer

    See all my reviews

    Pros

    • Adjustable Hood
    • Comfortable
    • Lightweight
    • Packs Small

    Cons

    • Inaccurate Temp Rating
    • Zipper Snags Easily

    Best Uses

    • 3 Season Camping
    • 4 Season camping
    • Backpacking
    • Car Camping
    • Cold Conditions

    Comments about Kelty Cosmic Down +0 Sleeping Bag:

    Kelty Cosmic down 0 degree sleeping bag

    I used this sleeping back during my hiking trip this weekend. I was sleeping in a hammock with a small quilt underneath me. The Temperatures dropped down into the low 40s F and it started raining. Fortunately I had set up my dry fly rain tarp, and it kept me dry except for on little part of the bag.

    The Good:
    The bag kept me very warm, in-fact I had to strip down to my boxers to stay cool enough. My feet did get kind of chilly even though I had a pair of wool socks on. See the bad for more details. The material is very comfortable against my skin, and I really like the neck draft baffle. A small portion of the bag got wet during the night, but after I aired it out in the sun it dried out quickly. The bag packs very small, and with a compression sack fits without any problem into my 70L internal frame back pack sleeping bag compartment. I am 5ft 9inches and I am glad that I bough the long version of the bag.

    The Bad:
    The zipper is not the best quality that I have every seen, but it should do the job. Even though this bag is rated as a zero degree bag, I would not recommend taking it to those conditions. It seems like this bag does have some cold spots. The cinch for the hood on the mummy bag doesn't look very strong.

    For the price, I think this bag was a good buy, but I don't think I would take it on a 0 deg camping trip

    • What Is Your Gear Style:
    • Comfort Driven
    • Was this a gift?:
    • No

    Comment on this review

     
    5.0

    Awesome bag for the price!

    By henryhawkins

    from Colorado

    About Me Military/Law Enforcement

    See all my reviews

    Site Member

    Pros

    • Adjustable Hood
    • Comfortable
    • Durable
    • Lightweight
    • Packs Small
    • Roomy
    • Warm

    Cons

    • Shell Absorbs Water

    Best Uses

    • 3 Season Camping
    • Backpacking
    • Car Camping
    • Climbing
    • Cold Conditions

    Comments about Kelty Cosmic Down +0 Sleeping Bag:

    I've come to the conclusion that whatever the comfort rating is add 25 degrees and you'll be right on. With this bag there were no cold spots. Love this sleeping bag it kept me warm in Northern Idaho this summer, and I hate being cold. I'm sure this would be a great 3 season sleeping bag. I will recommend this product to all my friends.

    • What Is Your Gear Style:
    • Comfort Driven
    • Was this a gift?:
    • No

    Comment on this review

     
    5.0

    Great Sleeping Bag

    By Devin Null

    from Salt Lake City, UT

    About Me Avid Adventurer

    See all my reviews

    Site Member

    Pros

    • Adjustable Hood
    • Comfortable
    • Lightweight
    • Packs Small
    • Roomy
    • Warm

    Cons

    • Shell Absorbs Water

    Best Uses

    • 4 Season camping
    • Backpacking

    Comments about Kelty Cosmic Down +0 Sleeping Bag:

    I bought this sleeping bag in an effort to stay warm while sleeping in a hammock during a backpacking trip in the Uinta mountains. It met and exceeded my expectations. I did spend one night on the ground under the stars, and the bag absorbed a fair amount of dew, so it's not very water resistant. I wasn't surprised by this though, and it dried in the sun quite quickly.

    • What Is Your Gear Style:
    • Comfort Driven
    • Was this a gift?:
    • No

    Comment on this review

    (2 of 2 customers found this review helpful)

     
    4.0

    Great for winter/spring backpacking.

    By The elevator

    from Clemson, SC

    About Me Avid Adventurer

    See all my reviews

    Site Member

    Pros

    • Adjustable Hood
    • Comfortable
    • Durable
    • Lightweight
    • Packs Small
    • Warm

    Cons

    • Too Small / Tight
    • Zipper Snags Easily

    Best Uses

    • 3 Season Camping
    • Backpacking

    Comments about Kelty Cosmic Down +0 Sleeping Bag:

    I have slept comfortably in 7 degree nights as in 53 degree nights in this bag and have yet to get cold. On warmer nights, above freezing, I leave the bag unzipped, if I don't I sweat, but I still do not get the slightest bit cold.

    • What Is Your Gear Style:
    • Minimalist
    • Was this a gift?:
    • Yes

    Comment on this review

    (1 of 1 customers found this review helpful)

     
    5.0

    Warm as toast

    By Gkcolorado

    from Cincinnati, OH

    About Me Casual/ Recreational

    See all my reviews

    Site Member

    Pros

    • Comfortable
    • Lightweight
    • Packs Small
    • Warm

    Cons

    • Shell Absorbs Water

    Best Uses

    • 3 Season Camping
    • 4 Season camping
    • Backpacking
    • Cold Conditions
    • Hunting

    Comments about Kelty Cosmic Down +0 Sleeping Bag:

    Most recently used in October on 7 day hunt in Colorado. At 11200, temps got down to teens and single digits.
    On night one, we had to quickly pitch tent on snow pack. Had very thin sleeping pad, stayed warm with plenty of room to move and adjust.
    Packs away nicely, although i used a different compression sack. Bag got went a couple nights due to condensation but dried out in an hour with proper ventilation. For someone who gets cold feet, its nice to know when you turn in for the night you will stay warm. Cant beat what you get for the price.

    • What Is Your Gear Style:
    • Minimalist
    • Was this a gift?:
    • No

    Comment on this review

    (5 of 5 customers found this review helpful)

     
    4.0

    Great value, great bag

    By bert the rugged outdoorsman

    from Seal Beach, CA

    About Me Avid Adventurer

    See all my reviews

    Site Member

    Pros

    • Adjustable Hood
    • Comfortable
    • Durable
    • Roomy
    • Warm

    Cons

    • Heavy / Bulky
    • Packs Too Large

    Best Uses

    • 4 Season camping
    • Backpacking
    • Cold Conditions

    Comments about Kelty Cosmic Down +0 Sleeping Bag:

    I was looking to replace a +20 synthetic, and go colder at the same time (a few nights in single digits tends to motivate).

    For down filling and it's EN rating, this Kelty bag is an EXCELLENT value. It's very warm and all the features function well; the zipper is easy to use and snag resistant, the draft tubes and hood/collar cinches are great, no dead spots thanks to the offset baffles, and there's enough room for side sleepers. I'm 5'11 and the regular fit like a glove.

    However, what's not listed on the specs is that the filling is duck down, not goose. Combined with the entry level 550 fill power and thicker fabrics than pricier bags, this leads to higher weight and lower compressibility overall. From testing in stores, I found most higher end 0 degree down bags to work with my current compression sack as good or better than the +20 synthetic. This Kelty seemed slightly harder to stuff, and a bit larger when compressed. It'd also be nice to have a pillow sleeve and internal storage pocket, but hey, they aren't essential and I'm not complaining at this price.

    Ultimately, it's a great bag from a quality brand, well made, very warm, and much MUCH cheaper than others in the same class. Get it, unless you're counting grams or cc's.

    I haven't had a chance to experience the water resistance like other reviewers, but I imagine some Nikwax Down Proof would help.

    Oh, and I happen to like the color, by the way.

    • What Is Your Gear Style:
    • Minimalist
    • Was this a gift?:
    • No

    Comment on this review

     
    4.0

    warm and confy

    By soaring eagle

    from scappoose,OR

    About Me Avid Adventurer

    See all my reviews

    Pros

    • Adjustable Hood
    • Comfortable
    • Lightweight
    • Packs Small
    • Warm

    Cons

      Best Uses

      • Backpacking

      Comments about Kelty Cosmic Down +0 Sleeping Bag:

      i have only slept in this bag at around 15 degrees, but i am possitive it will keep me warm at 0 too. i sleep with my head, chest and arms out of the bag and im still warm..shorts is the only thing i wear in my bag

      • What Is Your Gear Style:
      • Minimalist

      Comment on this review

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