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Kelty Cosmic 20 Down Mummy Sleeping Bag for Backpacking, Campers, 550 Fill Power, Recycled Fabrics with PFAS-Free DWR, Designed in Sunny Colorado, USA, 2024 Model

4.7 4.7 out of 5 stars 487 ratings

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Women's Regular

About this item

  • 100% Polyester Taffeta
  • Imported
  • TRAPEZOIDS, MAN: Turns out this funky shape is ideal for helping sleeping bags retain heat. Trapezoidal baffle construction improves our best selling Cosmic sleeping bag for 2021. Fan favorite and campsite staple with improved Thermal Efficiency
  • GET DOWN: Light, compressible, warm to boot; what’s not to love about Down Fill? The Cosmic features 550 fill Kelty treated DriDown insulation, with sustainably sourced materials that are easy to pack, use, dry, and keep your buns toasty.
  • ENTRY LEVEL VETERAN: Priced even lower for 2021, the Cosmic is more budget friendly than ever while retaining it’s well deserved reputation for a do-it-all backpacker’s slumber companion. First time campers and old timers rejoice
  • DUAL ZIPPERS: Two sliding, locking zippers with anti-snag draft tube - unzip from the bottom to stick a foot out and self-regulate heat while enjoying mummy-bag comfort. Zippered internal stash pocket for cell phone or headlamp
  • KELTY QUALITY: Good craftsmanship speaks for itself. Since 1952 Kelty has designed and manufactured quality, useful, and durable goods for the everyman (and woman) seeking to enjoy life outside. Headquarters in Colorado, USA

From the brand


From the manufacturer

Kelty Cosmic Down 20
Kelty Cosmic 20, a result of decades of design experience
Cosmic 20 specs
Kelty Cosmic Synthetic Kelty Cosmic 40 Synthetic Supernova 20 Supernova 0 Supernova 40 Tru comfort double blue
Kelty Cosmic 20 Synthetic Kelty Cosmic 40 Synthetic Kelty Supernova 20 Kelty Supernova 0 Kelty Supernova 40 Kelty Tru Comfort Doublewide
Customer Reviews
4.6 out of 5 stars
440
4.6 out of 5 stars
44
4.7 out of 5 stars
5
5.0 out of 5 stars
5
4.8 out of 5 stars
1,415
Temperature Rating (F): 20 40 20 0 40 20
Insulation: Cirroloft Synthetic Cirroloft Synthetic 550 Fill Down 550 Fill Down 550 Fill Down Cloudloft Synthetic
Fill Weight: 30.5oz 23.99oz 24oz 37oz 15oz 68oz
Total Weight: 2lbs. 13oz 2lbs. 4oz 3lbs. 4lbs. 2lbs. 1oz 9lbs. 8oz
Stuffed Size (inches): 16x9 15x8.5 14x8 17x9 12x6 15x23
Shell Material: 20D Nylon Taffeta 20D Nylon Taffeta Recycled 20D Nylon Taffeta Recycled 20D Nylon Taffeta Recycled 20D Nylon Taffeta 75D Polyester Taffeta
Liner Material: 50D Polyester Taffeta 50D Polyester Taffeta Recycled 20D Nylon Taffeta Recycled 20D Nylon Taffeta Recycled 20D Nylon Taffeta 75D Polyester Taffeta
Compression Sack Included:
Contains Recycled Materials
Highroads loveseat Low Loveseat Late start 4
Kelty Highroads Kelty Loveseat Kelty Low Loveseat Kelty Late Start 4P
Customer Reviews
4.8 out of 5 stars
1,168
4.8 out of 5 stars
1,931
5.0 out of 5 stars
2
Frame Material Anodized Aluminum Powder Coated Steel Powder Coated Steel Anodized Aluminum
Fabric Material Heavy Duty 210D Polyester Oxford 600D Puppy Proof Polyester 600D Puppy Proof Polyester 68D Polyester

Product Description

Remember the trapezoid from 10th-grade geometry? Turns out, this funky ol’ shape is ideal for helping sleeping bag baffles retain heat. The trapezoidal baffle construction improves on our best-selling Cosmic sleeping bag—and it’s just one of the reasons Cosmic is still our favorite three-season superstar. We also love the natural-fit foot box for happier feet, and a PFC-free water-repellent coating for a healthier environment.

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Customer reviews

4.7 out of 5 stars
4.7 out of 5
487 global ratings

Customers say

Customers like the warmth, portability, weight and quality of the sleeping bag. For example, they mention it's perfect for a cool weather backpacking trip, it stuffs easily into a pack and the material is soft and squishy. Customers also like the comfort and value.

AI-generated from the text of customer reviews

45 customers mention40 positive5 negative

Customers like the warmth of the sleeping bag. They mention it's heavy and bulky, yet still warm enough. Some say it'll keep them toasty even at 70 degrees, making it perfect for cool weather backpacking trips.

"...Overall, the Kelty Cosmic 20° is a fantastic value for the price. It's warm, comfortable, and packs down small, making it a great choice for three-..." Read more

"...Very light and compact to carry on, and super warm, very nice performance during our camping nights!" Read more

"Excellent quality and lightweight. The down feeling is super warm and toasty" Read more

"Hard to stuff back but very warm and high quality product, really warm." Read more

36 customers mention29 positive7 negative

Customers like the portability of the sleeping bag. For example, they say it's super warm, packs down small, and does not take up a ton of space. Some mention it'll compress down even smaller with additional stuffing. That said, most are happy with the port ability and size of the product.

"...Comfort that lulls you to sleep:Spacious interior: I never felt constricted, even tossing and turning like a human pretzel...." Read more

"...Very light and compact to carry on, and super warm, very nice performance during our camping nights!" Read more

"...It was easy to fit into the stuff sack and could get down smaller with compression. I do wish it would have come with a storage bag as well...." Read more

"...This one compresses so well and saves room.I am very happy with our purchase" Read more

33 customers mention29 positive4 negative

Customers like the weight of the sleeping bag. They say it's great for backpacking, has good materials, and is compact.

"...Lightweight and packable:Compresses down small: Easily stashed in my pack, leaving plenty of room for other gear...." Read more

"I bought this for my son, materials are top quality! Very light and compact to carry on, and super warm, very nice performance during our camping..." Read more

"Excellent quality and lightweight. The down feeling is super warm and toasty" Read more

"...I do wish it would have come with a storage bag as well. The bag is much lighter and stuffs down much smaller than any of the synthetic bags I've..." Read more

31 customers mention28 positive3 negative

Customers are satisfied with the quality of the sleeping bag. They mention it's a great product, with good materials. Some say that it'll last a while, and is dependable.

"...Durable ripstop nylon shell: Tough enough to handle the wilderness without weighing you down.A few things to consider:..." Read more

"I bought this for my son, materials are top quality!..." Read more

"Excellent quality and lightweight. The down feeling is super warm and toasty" Read more

"...This bag feels very similar to that one, and similar design. However, that bag weighs 60.8 ounces, and does not pack down very small...." Read more

25 customers mention25 positive0 negative

Customers like the comfort of the sleeping bag. They mention that the material is very soft and squishy, providing a comfortable sleep in temps of 30s and 40s. The soft lining is gentle against your skin, making it a pleasure to drift off to. They also appreciate the extra padding, which helps provide a good night's sleep for side sleepers.

"...Soft lining: The fabric is gentle against your skin, making it a pleasure to drift off to sleep.Natural-fit footbox: No more cramped toes!..." Read more

"...This bag is legit for a down bag, and especially comfortable...." Read more

"...This bag is comfortable and extremely lightweight feel, packs down small, and would be a good backpacking sleeping bag for parts of the year...." Read more

"...It was a comfortable sleep with the extra padding - side sleepers would appreciate that. My only criticism is that it's a little on the heavy side" Read more

16 customers mention16 positive0 negative

Customers appreciate the value of the sleeping bag. They say it is solid for the price point and has good quality.

"...Overall, the Kelty Cosmic 20° is a fantastic value for the price...." Read more

"Nice bag for the price and perfect for my son’s freshman class retreat with 30 degree lows. They stayed in unheated cabins...." Read more

"...But it packs small and light. Good bargain for me." Read more

"Have used this sleeping bag on a few back packing trips so far and it is a bargain. For the price it can't be beat...." Read more

9 customers mention9 positive0 negative

Customers are satisfied with the performance of the sleeping bag. They mention that it works wonderfully, is excellent, and is perfect.

"...Very light and compact to carry on, and super warm, very nice performance during our camping nights!" Read more

"...the sleeping bag as a gift and it looks really well-made and is going to work great after seeing this product compared to the synthetic version I..." Read more

"...I have to say that this bag worked extremely well for me over the four nights in different temperatures..." Read more

"This product works wonderfully!..." Read more

Comfortable and Warm
5 Stars
Comfortable and Warm
Tested it when it was 34°F (1°C) outside and I stayed nice and warm. I'm 5ft4in (167cm) and fairly small female, so I had plenty leg room to move around inside and not feel cramped. Getting it back into the stuff sack though was a challenge though, but other than that it's a 10 out of 10 for me.
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Reviewed in the United States on December 20, 2023
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Reviewed in the United States on March 20, 2024
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Reviewed in the United States on February 11, 2024
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Reviewed in the United States on February 21, 2022
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Reviewed in the United States on July 4, 2023
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Reviewed in the United States on January 24, 2024
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5.0 out of 5 stars Comfortable and Warm
Reviewed in the United States on January 24, 2024
Tested it when it was 34°F (1°C) outside and I stayed nice and warm. I'm 5ft4in (167cm) and fairly small female, so I had plenty leg room to move around inside and not feel cramped. Getting it back into the stuff sack though was a challenge though, but other than that it's a 10 out of 10 for me.
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2 people found this helpful
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Reviewed in the United States on January 1, 2023
Size: RegularStyle: RegularVerified Purchase
4 people found this helpful
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David Toledo
4.0 out of 5 stars Down kelty
Reviewed in Mexico on August 14, 2023
Size: ShortStyle: ShortVerified Purchase
2 people found this helpful
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