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TETON Sports Celsius vs Kelty Cosmic Down 20

Editorial Team
Last modified at August 9, 2026
When it comes to choosing a sleeping bag for outdoor adventures, two key factors to consider are warmth and packability. The TETON Sports Celsius and Kelty Cosmic Down 20 are two popular options that cater to different needs. In this comparison, we'll delve into the strengths and weaknesses of each sleeping bag to help you decide which one is best for your next camping trip.

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  • Side-by-side analysis based on real user feedback
  • Unbiased comparisons, not influenced by partnerships
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TETON Sports CelsiusKelty Cosmic Down 20
Celsius
Cosmic Down 20
Fill Type

SuperLoft Elite hollow fiber

550-fill down

Weight

Junior: 45.6 oz; Large: 68.8–78.4 oz; XXL: 88–152 oz

Regular: 39 oz

Size

Junior: 66 × 26 in; Large: 80 × 33 in; XXL: 90 × 39 in

Regular: 78 in long

Shell Material

70D/190T polyester taffeta

Recycled 20D nylon taffeta

Compression Sack

Included

Included; Regular: 8 × 13 in

Warranty

Limited lifetime

Limited lifetime

Lining Material

75D polyester flannel

Recycled 50D polyester taffeta

Baffle Construction

Offset-stitch double layer

Trapezoidal baffles

Color

Variant-specific

Not specified

Draft Tubes

Full-length shoulder and zipper draft tubes

Full draft tube and collar

Fill Power

Not applicable - synthetic fill

550 fill

Foot Box

Rectangular

Natural-fit footbox

Comfort

Celsius

4.2/ 5.0

Cosmic Down 20

4.2/ 5.0

Comfort is a crucial aspect of a sleeping bag, as it directly affects the quality of sleep. Both the TETON Sports Celsius and Kelty Cosmic Down 20 have received praise for their comfort, with the Celsius boasting a soft and fluffy interior. However, the Cosmic Down 20 has a slightly higher comfort rating, indicating that it might be the better choice for those who prioritize a restful night's sleep. The tie in this category suggests that both sleeping bags are comfortable, but the Cosmic Down 20 has a slight edge.

Durability

Celsius

3.1/ 5.0

Cosmic Down 20

4.4/ 5.0

Durability is essential for a sleeping bag, as it needs to withstand various weather conditions and frequent use. The Kelty Cosmic Down 20 has a higher durability rating, indicating that it is more resistant to wear and tear. This makes it a better choice for those who plan to use their sleeping bag frequently or in harsh environments. The Celsius, on the other hand, may not be as durable, but it still offers great value for its price.

Warmth

Celsius

4.6/ 5.0

Cosmic Down 20

4.7/ 5.0

Warmth is a critical factor in a sleeping bag, especially for those who camp in cold weather. Both the TETON Sports Celsius and Kelty Cosmic Down 20 have received praise for their warmth, with the Celsius exceling in keeping users cozy even in subzero conditions. The tie in this category suggests that both sleeping bags are warm, but the Cosmic Down 20 has a slightly higher warmth rating.

Packability

Celsius

2.6/ 5.0

Cosmic Down 20

4.1/ 5.0

Packability is an important consideration for backpackers, as a sleeping bag that is too bulky can be a hindrance on the trail. The Kelty Cosmic Down 20 has a higher packability rating, indicating that it is more compact and lightweight. This makes it a better choice for those who need to carry their sleeping bag long distances. The Celsius, on the other hand, is less ideal for backpacking trips due to its bulkiness.

Ease Of Use

Celsius

3.1/ 5.0

Cosmic Down 20

3.1/ 5.0

Ease of use is a factor to consider when choosing a sleeping bag, as some bags may be more complicated to set up or use than others. Both the TETON Sports Celsius and Kelty Cosmic Down 20 have similar ease of use ratings, indicating that they are both relatively easy to use. However, the lack of detailed feedback in this category makes it difficult to declare a clear winner.

Versatility

Celsius

3.1/ 5.0

Cosmic Down 20

3.1/ 5.0

Versatility is an important consideration for those who plan to use their sleeping bag in different environments or for different activities. Both the TETON Sports Celsius and Kelty Cosmic Down 20 have similar versatility ratings, indicating that they are both relatively versatile. However, the lack of detailed feedback in this category makes it difficult to declare a clear winner.

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Conclusion & Final Verdict:

In conclusion, the TETON Sports Celsius and Kelty Cosmic Down 20 are both high-quality sleeping bags that cater to different needs. The Celsius is ideal for car camping or cabin sleeping due to its warmth and comfort, while the Cosmic Down 20 is better suited for backpacking trips due to its packability and durability. Ultimately, the choice between these two sleeping bags depends on your specific needs and preferences. If you prioritize warmth and comfort, the Celsius may be the better choice. However, if you need a sleeping bag that is lightweight and compact, the Cosmic Down 20 is the way to go.

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