Kelty Mistral 40 vs Kelty Cosmic Down 20
Why You Can Trust Us
- Side-by-side analysis based on real user feedback
- Unbiased comparisons, not influenced by partnerships
- Updated as new data becomes available
We may earn from affiliate links at no extra cost to you.
| Mistral 40 | Cosmic Down 20 | |
|---|---|---|
![]() | ![]() VS | |
| Fill Type | CloudLoft synthetic | 550-fill down |
| Weight | 44 oz | Regular: 39 oz |
| Size | Regular: 76 in long | Regular: 78 in long |
| Shell Material | 190T polyester taffeta | Recycled 20D nylon taffeta |
| Compression Sack | Included | Included; Regular: 8 × 13 in |
| Warranty | Limited lifetime | Limited lifetime |
| Lining Material | 190T polyester taffeta | Recycled 50D polyester taffeta |
| Baffle Construction | Offset quilted | Trapezoidal baffles |
| Color | Green | Not specified |
| Draft Tubes | Draft-locked zipper | Full draft tube and collar |
| Fill Power | Not applicable - synthetic fill | 550 fill |
| Foot Box | Natural-fit spacious footbox | Natural-fit footbox |
| Kelty Mistral 40 | Kelty Cosmic Down 20 |
|---|---|
![]() | ![]() |
| Fill Type | |
CloudLoft synthetic | 550-fill down |
| Weight | |
44 oz | Regular: 39 oz |
| Size | |
Regular: 76 in long | Regular: 78 in long |
| Shell Material | |
190T polyester taffeta | Recycled 20D nylon taffeta |
| Compression Sack | |
Included | Included; Regular: 8 × 13 in |
| Warranty | |
Limited lifetime | Limited lifetime |
| Lining Material | |
190T polyester taffeta | Recycled 50D polyester taffeta |
| Baffle Construction | |
Offset quilted | Trapezoidal baffles |
| Color | |
Green | Not specified |
| Draft Tubes | |
Draft-locked zipper | Full draft tube and collar |
| Fill Power | |
Not applicable - synthetic fill | 550 fill |
| Foot Box | |
Natural-fit spacious footbox | Natural-fit footbox |
Comfort
Mistral 40
Cosmic Down 20
Comfort is crucial for a good night's sleep, especially when you're out in the wilderness. A comfortable sleeping bag can make a significant difference in your overall camping experience. The Kelty Mistral 40 excels in this category with its spacious natural fit foot box, full hooded draft tube, and women's specific cut, which are designed to provide a cozy and unrestricted sleeping environment. Buyers consistently praise its comfort and comfort hood, making it a standout choice for those who prioritize a restful sleep. While the Kelty Cosmic Down 20 also receives positive feedback for comfort, it lacks the additional features that make the Mistral 40 more comfortable.
Durability
Mistral 40
Cosmic Down 20
Durability ensures that your sleeping bag can withstand the rigors of outdoor use and last for many camping trips. A durable sleeping bag is an investment that pays off in the long run. The Kelty Cosmic Down 20 shines in this category with its high-quality materials and construction, receiving consistent praise for its durability. The Mistral 40, while durable, has fewer mentions of its durability, making the Cosmic Down 20 the better choice for those looking for a long-lasting sleeping bag.
Warmth
Mistral 40
Cosmic Down 20
Warmth is essential for staying comfortable in cold weather conditions. A warm sleeping bag can make the difference between a pleasant night and a miserable one. The Kelty Cosmic Down 20 is rated higher for warmth, with buyers praising its ability to keep them warm in temperatures as low as 20°F. The Mistral 40 also provides good warmth but has a few complaints that keep it from being flawless. If warmth is a top priority, the Cosmic Down 20 is the better choice.
Packability
Mistral 40
Cosmic Down 20
Packability is important for campers who need to save space in their backpacks. A compact sleeping bag is easier to carry and store. Both the Kelty Mistral 40 and the Kelty Cosmic Down 20 score equally in this category, with positive feedback on their included compression sacks and compact sizes. This makes it a tie, as both products offer similar advantages in terms of packability.
Ease Of Use
Mistral 40
Cosmic Down 20
Ease of use can greatly enhance your camping experience, making it simpler to set up and pack away your sleeping bag. The Kelty Mistral 40 stands out with its non-snag zipper and dual slide snag-free locking zippers, which make it easier to use. The Cosmic Down 20, on the other hand, lacks sufficient feedback in this area, making the Mistral 40 the clear winner for ease of use.
Versatility
Mistral 40
Cosmic Down 20
Versatility allows a sleeping bag to be used in a variety of conditions and seasons, making it a more flexible option for different camping scenarios. The Kelty Mistral 40 offers better versatility with its dual slide snag-free locking zippers that provide venting options, making it suitable for different weather conditions. The Cosmic Down 20 lacks detailed feedback in this area, making the Mistral 40 the better choice for those seeking a versatile sleeping bag.
Trust & Transparency
- Data-driven rankings from real user reviews
- Affiliate partnerships don't influence our methodology
We may earn commission from links.
Conclusion & Final Verdict:
In conclusion, the Kelty Mistral 40 and the Kelty Cosmic Down 20 each have their strengths and weaknesses. The Mistral 40 excels in comfort, ease of use, and versatility, making it a great choice for those who prioritize a comfortable and user-friendly sleeping bag. On the other hand, the Cosmic Down 20 stands out in durability and warmth, making it ideal for those who need a long-lasting and warm sleeping bag. Depending on your specific needs and preferences, either of these sleeping bags could be the right choice for you.
Related Comparisons
Kelty Mistral 40vsColeman Kompact 30°F Rectangle
The Kelty Mistral 40 excels in warmth and packability, ideal for cold-weather campers, while the Coleman Kompact 30°F Rectangle offers better durability and versatility for general use.
Kelty Mistral 40vsMarmot Trestles Elite Eco 20° Long
The Kelty Mistral 40 excels in packability and ease of use with its lightweight design and snag-free zippers, while the Marmot Trestles Elite Eco 20° Long offers superior warmth and durability. Choose the Mistral 40 for backpacking and the Trestles Elite Eco for car camping.
Kelty Mistral 40vsOneTigris Trailnap
The Kelty Mistral 40 offers superior comfort and packability with its lightweight design and compression sack, making it ideal for backpackers. The OneTigris Trailnap, while heavier, excels in versatility for various outdoor activities.
Kelty Mistral 40vsSierra Designs Frontcountry Bed 20
The Kelty Mistral 40 offers superior warmth and comfort, ideal for colder conditions, while the Sierra Designs Frontcountry Bed 20 excels in packability and stability, better suited for milder weather.
Kelty Mistral 40vsTETON Sports Altos Down 0°F
The Kelty Mistral 40 excels in comfort and warmth, making it ideal for those prioritizing a cozy night's sleep. The TETON Sports Altos Down 0°F, while less comfortable, offers better packability and durability, suited for rugged outdoor adventures.
OneTigris TrailnapvsKelty Cosmic Down 20
The OneTigris Trailnap offers versatility and ease of use, while the Kelty Cosmic Down 20 excels in warmth and durability. Choose based on your priority: adaptability or superior warmth.

