Kelty Mistral 40 vs TETON Sports Celsius

Editorial Team
Last modified at July 31, 2026
When it comes to budget sleeping bags, the Kelty Mistral 40 and TETON Sports Celsius are two popular options that cater to different needs. The Mistral 40 is designed with comfort and packability in mind, making it a great choice for backpackers who need a reliable and easy-to-carry sleeping bag. On the other hand, the Celsius stands out for its exceptional warmth, making it ideal for those who camp in colder conditions and prioritize a cozy night's sleep.

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Kelty Mistral 40TETON Sports Celsius
Mistral 40
Celsius
Fill Type

CloudLoft synthetic

SuperLoft Elite hollow fiber

Weight

44 oz

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

Size

Regular: 76 in long

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

Shell Material

190T polyester taffeta

70D/190T polyester taffeta

Compression Sack

Included

Included

Warranty

Limited lifetime

Limited lifetime

Lining Material

190T polyester taffeta

75D polyester flannel

Baffle Construction

Offset quilted

Offset-stitch double layer

Color

Green

Variant-specific

Draft Tubes

Draft-locked zipper

Full-length shoulder and zipper draft tubes

Fill Power

Not applicable - synthetic fill

Not applicable - synthetic fill

Foot Box

Natural-fit spacious footbox

Rectangular

Comfort

Mistral 40

4.6/ 5.0

Celsius

4.2/ 5.0

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 comfort with features like a comfort hood, spacious natural fit foot box, and a women's specific cut, ensuring a snug and cozy fit. Users appreciate the full hooded draft tube and the open toe box, which prevent feelings of being trapped. The TETON Sports Celsius also offers a comfortable experience with a soft and fluffy interior, but it lacks some of the specialized comfort features found in the Mistral 40. Therefore, if comfort is your top priority, the Mistral 40 is the better choice.

Durability

Mistral 40

3.6/ 5.0

Celsius

3.1/ 5.0

Durability ensures that your sleeping bag can withstand the rigors of outdoor use and last for many camping trips. The Kelty Mistral 40 has a durable polyester shell and liner, which provides a good level of durability for its price point. While the TETON Sports Celsius does not have as much feedback regarding its durability, it is generally considered to be less durable than the Mistral 40. This makes the Mistral 40 a more reliable choice for those who need a sleeping bag that can handle frequent use and rough conditions.

Warmth

Mistral 40

4.4/ 5.0

Celsius

4.6/ 5.0

Warmth is essential for staying comfortable and safe during cold nights. The TETON Sports Celsius excels in this category, with users consistently praising its ability to keep them warm even in subzero conditions. Its cozy insulation and draft tubes help prevent cold spots, making it an excellent choice for cold weather camping. The Kelty Mistral 40 also offers good warmth with its CloudLoft synthetic insulation and offset quilt construction, but it is not as warm as the Celsius. If you camp in cold conditions, the Celsius is the better option for warmth.

Packability

Mistral 40

4.1/ 5.0

Celsius

2.6/ 5.0

Packability is important for backpackers who need to save space and reduce weight in their packs. The Kelty Mistral 40 shines in this category with its included compression sack and lightweight design, making it easy to pack and carry. The TETON Sports Celsius, however, is bulkier and less packable, which can be a drawback for those who need to save space. The Mistral 40's packability makes it a more versatile choice for backpacking trips where space and weight are critical factors.

Ease Of Use

Mistral 40

4.1/ 5.0

Celsius

3.1/ 5.0

Ease of use can greatly enhance your camping experience, making it quicker and simpler to set up and pack your sleeping bag. The Kelty Mistral 40 features a non-snag zipper and dual slide snag-free locking zippers, which make it easy to use and prevent frustration during setup. The TETON Sports Celsius, on the other hand, has a zipper that can be finicky and sometimes gets stuck, which can be a hassle. Therefore, the Mistral 40 is the better choice for those who value ease of use and convenience.

Versatility

Mistral 40

4.1/ 5.0

Celsius

3.1/ 5.0

Versatility allows a sleeping bag to be used in various conditions and seasons, making it a more flexible option for different camping scenarios. The Kelty Mistral 40 offers venting versatility with its dual slide snag-free locking zippers and is suitable for different weights and seasons, including summer, spring, and autumn. The TETON Sports Celsius, while excellent for cold weather, does not offer the same level of versatility. This makes the Mistral 40 a more adaptable choice for campers who encounter a range of conditions.

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Conclusion & Final Verdict:

In conclusion, the Kelty Mistral 40 and TETON Sports Celsius each have their strengths and are suited to different camping needs. The Mistral 40 is the better choice for backpackers who need a comfortable, packable, and versatile sleeping bag. Its lightweight design, ease of use, and durability make it ideal for a range of conditions and seasons. On the other hand, the Celsius is the go-to option for those who prioritize warmth and comfort in cold weather. Its superior insulation and cozy interior make it perfect for cold-weather camping. Ultimately, your choice will depend on your specific camping needs and preferences.

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