Last Updated on September 27, 2026 by Mason Reed
Choosing the best Kelty sleeping bag starts with the weather you expect, the space in your backpack, and how much room you need to sleep comfortably. Kelty offers synthetic and down sleeping bags for everything from mild summer trips to colder overnight adventures.
For colder camping trips, the Kelty Mistral 0 Long offers substantial synthetic insulation and a roomy long fit. If you want something lighter for mild conditions, consider the Kelty Cosmic Synthetic 40.
These five picks cover different temperature ratings, insulation types, weights, and sleeping styles. Compare their features below to find the right bag for your next trip.
Best Kelty Sleeping Bags Compared
| Product | Best for | Temperature rating | Insulation | Weight |
|---|---|---|---|---|
Budget | Cold-weather camping | 0°F | CloudLoft ECO synthetic | 4.56 lb, Long |
| Mild-weather backpacking | 40°F | CirroLoft synthetic | About 2 lb 6 oz, Regular 2022 | |
Mid-range | Roomy down-filled comfort | 30°F | 550-fill duck down | About 2.9 lb |
Premium | Spacious sleeping positions | 40°F | 550-fill down | About 2.1 lb, Regular |
| Cool-weather backpacking | 20°F | CirroLoft ECO synthetic | About 2 lb 13 oz, Regular |
| Kelty Sleeping-Bags Kelty Mistral Synthetic Camping Sleeping Bag | Best Budget Option | Temperature Rating: 20 degrees | Insulation Type: Cloudloft synthetic | Weight: 2lbs 13oz | VIEW LATEST PRICE | Read Our Analysis | |
| Kelty Cosmic 40 Degree Backpacking Sleeping Bag | Lightweight Backpacker’s Choice | Temperature Rating: 40 degrees | Insulation Type: Cirroloft synthetic | Weight: 2lbs 6oz | VIEW LATEST PRICE | Read Our Analysis | |
| Kelty Galactic Down 30 Degree Sleeping Bag | Premium Comfort | Temperature Rating: 30 degrees | Insulation Type: 550 fill down | Weight: 2lbs 14oz | VIEW LATEST PRICE | Read Our Analysis | |
| Kelty Supernova Down Sleeping Bag Compact & Lightweight | Eco-Friendly Design | Temperature Rating: Not specified (but implied for cold conditions) | Insulation Type: 550 fill down | Weight: 4lbs 13oz | VIEW LATEST PRICE | Read Our Analysis | |
| Kelty Cosmic 20 Degree Backpacking Sleeping Bag | Versatile Performance | Temperature Rating: 20 degrees | Insulation Type: Cirroloft synthetic | Weight: 2lbs 13oz | VIEW LATEST PRICE | Read Our Analysis |
Variant note: The comparison above reflects the currently identified linked versions. The original product-summary component contains older or conflicting details for some models. Check the exact temperature rating and size on Amazon before ordering.
More Details on Our Top Picks
Kelty Sleeping-Bags Kelty Mistral Synthetic Camping Sleeping Bag
If you’re a woman looking for a reliable sleeping bag that’s perfect for cooler camping trips, the Kelty Mistral Synthetic Camping Sleeping Bag is an excellent choice. Weighing just 2lbs 13oz, it’s lightweight yet durable, thanks to its 190T polyester taffeta shell. Designed for women up to 5ft 8in, the bag features Kelty’s Cloudloft synthetic insulation, ensuring you stay warm in temperatures as low as 20 degrees. Its offset quilt pattern prevents cold spots, providing ideal comfort. Plus, with a budget-friendly price and Kelty’s reputation for quality, you’ll enjoy many camping adventures with this dependable sleeping bag.
- Temperature Rating:20 degrees
- Insulation Type:Cloudloft synthetic
- Weight:2lbs 13oz
- Packed Size:16×9.5 inches
- Fit Size:Up to 5ft 8in
- Brand:Kelty
- Additional Feature:Offset quilt pattern
- Additional Feature:Budget-friendly option
- Additional Feature:Women’s specific fit
Best overall for cold-weather campingBottom line: The linked Kelty Mistral 0 Long is a substantial synthetic sleeping bag for colder trips. Its longer shape and insulated mummy design suit campers who prioritize warmth over low pack weight.
Important: This affiliate link identifies the 0°F Long version, not the women’s 20°F version described in the older product component above.
- Temperature rating: 0°F, intended for colder camping conditions.
- Insulation: CloudLoft ECO synthetic, with recycled insulation fibers.
- Weight: 4.56 lb, a substantial backpacking load.
- Fit: Long version fits sleepers up to 6 ft 6 in.
- Packed size: 12 x 20 inches, requiring considerable pack space.
The Mistral combines synthetic insulation with offset quilted construction and a draft collar. These features help control heat loss during cold nights. Its spacious footbox also gives your feet more room than a narrowly tapered design.
The trade-off is weight and packed size. This version makes more sense for cold-weather camping and shorter carries than minimalist backpacking.
Pros- 0°F temperature rating
- CloudLoft synthetic insulation
- Long fit accommodates taller campers
- Offset quilting and draft collar
Cons- Heavy for long-distance backpacking
- Bulky compared with lighter three-season bags
- Too much insulation for many warm-weather trips
Best for: Colder camping trips and taller sleepers who want synthetic insulation.Skip it if: You need a compact bag for warm-weather backpacking.Check first: Confirm that the selected Amazon option is 0°F Long.See today’s price, delivery date and return policy on Amazon.Kelty Cosmic 40 Degree Backpacking Sleeping Bag
The Kelty Cosmic 40 Degree Backpacking Sleeping Bag is ideal for outdoor enthusiasts seeking a lightweight and versatile option for mild weather camping. Weighing just 2lbs 6oz, it’s perfect for backpacking trips. The Cirroloft synthetic fill provides reliable warmth and maintains loft, ensuring no cold spots. Its 20D nylon taffeta shell and 50D taffeta liner make it durable and comfortable. With a spacious footbox and an integrated compression stuff sack, packing is a breeze. Plus, an exterior stash pocket keeps your essentials handy. Whether you’re 5’8” or 6’6”, you’ll find a fit that works for you.
- Temperature Rating:40 degrees
- Insulation Type:Cirroloft synthetic
- Weight:2lbs 6oz
- Packed Size:15×8 inches
- Fit Size:Up to 6ft
- Brand:Kelty
- Additional Feature:Integrated compression stuff sack
- Additional Feature:Exterior stash pocket
- Additional Feature:Natural fit spacious footbox
Best for mild-weather backpackingBottom line: The Kelty Cosmic Synthetic 40 is a lighter synthetic option for mild nights and summer backpacking. Its roomy footbox and compression sack make it practical for carrying on the trail.
- Temperature rating: 40°F, suited to milder overnight conditions.
- Insulation: CirroLoft synthetic, designed for compressible warmth.
- Weight: About 2 lb 6 oz for the Regular 2022 version.
- Fit: Regular fits sleepers up to 6 ft.
- Packed size: Approximately 15 x 8.5 inches.
The Cosmic Synthetic 40 includes a natural-fit footbox, a stash pocket, and a compression stuff sack. These details make it useful for backpackers who want simple organization and easier packing.
Its main limitation is the temperature rating. A 40°F bag is not the right choice for a trip where temperatures may approach freezing without an appropriate sleep system and additional protection.
Pros- Lighter than the colder-rated synthetic models
- CirroLoft insulation
- Spacious footbox
- Compression stuff sack included
- Useful stash pocket
Cons- Not intended for freezing overnight conditions
- Linked version is an older generation
- Regular length is not suitable for every tall sleeper
Best for: Summer backpackers and campers expecting mild nights.Skip it if: Your route includes freezing temperatures or cold shoulder-season nights.Check first: The linked version is Regular 2022; check the selected size and model year.See today’s price, delivery date and return policy on Amazon.Kelty Galactic Down 30 Degree Sleeping Bag
For backpackers and campers seeking a reliable sleeping bag, the Kelty Galactic Down 30 Degree Sleeping Bag stands out with its 550 fill power RDS trackable down, ensuring warmth and comfort on chilly nights. Made from durable polyester taffeta, it features a compressible, lightweight design that fits individuals up to 6 feet tall. The 2-way zippers allow for foot ventilation and temperature regulation, while a cinch cord provides a snug fit. Plus, you can zip it together with another Galactic bag for a cozy 2-person experience. Weighing only 2 lbs 14 oz, it’s perfect for your next adventure.
- Temperature Rating:30 degrees
- Insulation Type:550 fill down
- Weight:2lbs 14oz
- Packed Size:15×8 inches
- Fit Size:Up to 6ft
- Brand:Kelty
- Additional Feature:2-way zippers
- Additional Feature:Cinch cord for fit
- Additional Feature:RDS certified down
Best for roomy down comfortBottom line: The Kelty Galactic Down 30 gives campers down insulation in a roomier shape. It is particularly appealing if you want a bag that can connect with another compatible Galactic.
- Temperature rating: 30°F, designed for cool overnight conditions.
- Insulation: 550-fill duck down.
- Weight: Approximately 2.9 lb.
- Fit: Approximately 6 ft, with a roomy design.
- Packed size: Approximately 15 x 7.5 inches.
The Galactic uses a 50D polyester taffeta fabric and includes a top cord adjustment and zipper draft tube. Its shape offers more freedom of movement than a closely fitted mummy bag.
Two compatible Galactic bags can zip together. However, down insulation requires careful drying and storage, especially after wet trips.
Pros- 550-fill down insulation
- Roomy sleeping shape
- Compatible bags can zip together
- Top cord adjustment
- Included stuff sack
Cons- Down requires careful drying after exposure to moisture
- Heavier than some narrower backpacking bags
- 30°F rating may not provide enough margin for colder nights
Best for: Campers who want down insulation and a roomier shape.Skip it if: You expect frequent wet conditions and prefer easier-care synthetic insulation.Check first: Confirm zipper compatibility if you plan to connect two Galactic bags.See today’s price, delivery date and return policy on Amazon.Kelty Supernova Down Sleeping Bag Compact & Lightweight
Designed with versatility in mind, the Kelty Supernova Down Sleeping Bag is perfect for outdoor enthusiasts who need a lightweight and compact solution for their adventures. Weighing just 4 lbs. 13 oz. and packing down to 17 x 10 inches, it’s easy to carry. The 100% recycled nylon shell and RDS certified down fill guarantee warmth and sustainability. Its roomy design accommodates various body types, and the anti-snag zipper makes for hassle-free entry. Plus, you can zip two Supernova bags together for a cozy two-person experience. Enjoy premium comfort and a healthier planet with this exceptional sleeping bag!
- Temperature Rating:Not specified (but implied for cold conditions)
- Insulation Type:550 fill down
- Weight:4lbs 13oz
- Packed Size:17×10 inches
- Fit Size:Up to 6ft 6in
- Brand:Kelty
- Additional Feature:100% recycled nylon material
- Additional Feature:Roomy shape design
- Additional Feature:Anti-snag zipper design
Premium pick for spacious sleepingBottom line: The linked Kelty Supernova 40 combines a roomy shape with down insulation. Its ability to open flat makes it useful for campers who dislike restrictive mummy bags.
Important: The linked listing identifies a 40°F version. The specifications for other Supernova temperature ratings should not be applied to this version.
- Temperature rating: 40°F, suited to mild overnight conditions.
- Insulation: 550-fill down.
- Weight: About 2.1 lb for the Regular 40°F model.
- Fit: Regular fits sleepers up to 6 ft.
- Packed size: Approximately 13 x 7 x 7 inches.
The Supernova features recycled shell and liner fabrics, an anti-snag zipper, and a wider semi-rectangular design. It opens into a blanket and can connect with another compatible Supernova.
That extra room is useful for side sleepers and anyone who moves during the night. However, the 40°F version is intended for mild conditions rather than freezing weather.
Pros- Roomy semi-rectangular design
- 550-fill down insulation
- Recycled shell and liner fabrics
- Opens flat as a blanket
- Can connect with another compatible Supernova
Cons- 40°F version is not intended for freezing conditions
- Roomier shape uses more space than a narrow mummy bag
- Down insulation requires careful moisture management
Best for: Mild-weather campers who prioritize sleeping space and a flexible design.Skip it if: You need a bag for freezing temperatures.Check first: Confirm the selected temperature rating and size. Supernova models have different specifications.See today’s price, delivery date and return policy on Amazon.Kelty Cosmic 20 Degree Backpacking Sleeping Bag
A standout feature of the Kelty Cosmic 20 Degree Backpacking Sleeping Bag is its impressive temperature rating, making it an ideal choice for cold-weather adventurers. With a weight of just 2lbs 13oz and a fill weight of 30.5oz, it’s lightweight for backpacking. The Cirroloft synthetic insulation keeps you warm in damp conditions, ensuring no cold spots. Its spacious footbox allows for toe movement, and it fits sleepers up to 6ft comfortably. Plus, the integrated compression stuff sack enhances packability. With Kelty’s reputation for durability, you can trust this bag for your next outdoor adventure.
- Temperature Rating:20 degrees
- Insulation Type:Cirroloft synthetic
- Weight:2lbs 13oz
- Packed Size:16×9 inches
- Fit Size:Up to 6ft
- Brand:Kelty
- Additional Feature:Handy exterior stash pocket
- Additional Feature:Premium packability features
- Additional Feature:Cirroloft synthetic insulation
Best for cool-weather backpackingBottom line: The Kelty Cosmic Synthetic 20 balances a cooler temperature rating with the practical benefits of synthetic insulation. It suits backpackers who expect cool nights and want a bag that is easier to manage around moisture.
- Temperature rating: 20°F, designed for cooler overnight conditions.
- Insulation: CirroLoft ECO synthetic.
- Weight: Approximately 2 lb 13 oz for the Regular version.
- Fit: Regular fits sleepers up to 6 ft.
- Packed size: Approximately 9.5 x 18 inches.
The Cosmic Synthetic 20 uses recycled synthetic insulation and includes a contoured hood, draft collar, and natural-fit footbox. These features help balance warmth and comfort.
Its compression sack makes packing more convenient, although the bag remains bulkier than many comparable down models.
Pros- 20°F temperature rating
- Synthetic insulation suits variable conditions
- Contoured hood and draft collar
- Spacious footbox
- Compression stuff sack included
Cons- Heavier than the Cosmic Synthetic 40
- Less compressible than many comparable down bags
- 20°F rating is not a guarantee of comfort at 20°F
Best for: Cool-weather backpackers who prefer synthetic insulation.Skip it if: Minimum packed size is your main priority.Check first: Confirm the selected size and temperature rating before ordering.See today’s price, delivery date and return policy on Amazon.
Kelty Mistral 0 Long vs Cosmic Synthetic 40: Which Should You Get?
These bags serve different conditions. The Mistral 0 Long emphasizes cold-weather insulation, while the Cosmic Synthetic 40 is lighter and better suited to mild nights.
- Temperature rating: The Mistral is rated 0°F; the Cosmic is rated 40°F.
- Weight: The Cosmic Synthetic 40 is substantially lighter.
- Fit: The linked Mistral is a Long version, while the linked Cosmic is Regular.
- Insulation: Both use synthetic insulation, but their warmth and bulk differ significantly.
Which Kelty Sleeping Bag Should You Buy?
- For colder camping: Get the Kelty Mistral 0 Long.
- For mild-weather backpacking: Get the Kelty Cosmic Synthetic 40.
- For roomy down comfort: Get the Kelty Galactic Down 30.
- For side sleepers who want extra room: Get the Kelty Supernova 40.
- For cool-weather backpacking with synthetic insulation: Get the Kelty Cosmic Synthetic 20.
How We Chose
We compared the models using their published specifications and the features that matter most during real camping trips.
- Temperature ratings: We considered the intended conditions and differences between warmer and colder-rated bags.
- Insulation: We compared synthetic and down fill for weight, compressibility, and moisture management.
- Weight and packed size: We considered how easily each bag fits into a backpack.
- Comfort and fit: We examined available lengths, footbox shapes, zippers, and sleeping space.
- Product documentation: Specifications were checked against Kelty product information and the linked Amazon listings. No independent laboratory or hands-on testing is claimed.
Manufacturer information is available from the official Kelty website. Exact specifications may differ by generation, size, and temperature rating.
Factors to Consider When Choosing Kelty Sleeping Bags
The right sleeping bag should match your expected overnight temperatures, sleeping style, and carrying needs. These factors will help narrow your choice.
Temperature Rating Importance
Temperature rating is one of the most important things to check before buying a sleeping bag. A 40°F model serves a different purpose from a 0°F model.
Remember that a temperature rating is not a guarantee that every sleeper will feel comfortable at that temperature. Your sleeping pad, clothing, metabolism, wind exposure, and shelter all affect warmth.
Choose a bag with a suitable safety margin below the temperatures you expect. For cooler backpacking trips, the Kelty Cosmic Synthetic 20 offers a different warmth category from the lighter Cosmic Synthetic 40.
Insulation Type Differences
Kelty offers both synthetic and down insulation. Synthetic fills such as CloudLoft and CirroLoft are practical for campers who expect variable weather or want simpler moisture management.
Down generally offers excellent compressibility and warmth relative to its weight. However, it needs careful drying and storage.
The Kelty Galactic Down 30 is worth considering if you prefer down insulation and a roomier sleeping shape.
Weight and Packability
Weight matters more when you carry your sleeping bag over long distances. Even a small difference becomes noticeable when combined with your tent, food, water, and other equipment.
Check the total bag weight rather than comparing insulation weight alone. Packed size also matters because a bulky sleeping bag can take up a large part of your backpack.
For mild-weather trips, the Kelty Cosmic Synthetic 40 offers a lighter option than the colder-rated Mistral 0 Long.
Size and Fit
A sleeping bag should accommodate your height without compressing the insulation around your feet. Check the manufacturer’s maximum fit height for the exact size you plan to buy.
Consider your sleeping position too. Side sleepers and people who move frequently may prefer a roomier design, while a closer-fitting mummy shape can reduce the amount of interior space that needs warming.
The Kelty Supernova 40 offers a roomy shape for sleepers who value freedom of movement.
Material Durability
Shell and liner materials affect comfort, weight, and wear resistance. Kelty uses polyester and nylon fabrics across different models.
Inspect the zipper, stitching, and fabric regularly. Keep the bag away from sharp objects and rough surfaces that could damage the shell.
Proper cleaning and storage also matter. A sleeping bag that is stored wet or compressed for long periods can lose performance regardless of its original material quality.
Design Features and Comfort
Small design details can make a noticeable difference during a camping trip.
A spacious footbox allows your feet to move. Two-way zippers can provide ventilation, while draft collars and insulated zipper tubes help reduce heat loss.
Stash pockets are useful for keeping small essentials close. Compression stuff sacks help with packing, although a roomy storage sack is preferable between trips.
Budget Considerations
Consider how frequently you camp and the conditions you expect. A simpler synthetic sleeping bag may offer everything you need for occasional trips.
More expensive materials or down insulation may be worth considering when packed size and weight matter. However, a premium bag is not automatically a better choice for every climate.
Choose the temperature rating, shape, and size first. Then compare the available models within your budget.
Brand Reputation and Legacy
Kelty has been part of the outdoor equipment industry since 1952. Its sleeping bag range includes options for recreational camping and backpacking.
The brand offers a limited warranty covering manufacturing defects in materials and workmanship for the reasonable lifetime of qualifying sleeping bags.
Coverage depends on the purchase and warranty conditions, so review the official policy and keep your proof of purchase.
Mistakes to Avoid When Buying Kelty Sleeping Bags
- Buying by the advertised rating alone: Consider your expected temperatures and the warmth of your complete sleep system.
- Ignoring the selected variant: Check size, temperature rating, and generation on the product listing.
- Choosing a bag that is too short: Confirm the maximum fit height before buying.
- Overlooking packed size: Make sure the sleeping bag fits your backpack alongside the rest of your equipment.
- Storing it compressed: Use a roomy storage sack or hang the bag between trips.
Frequently Asked Questions
Are Kelty Sleeping Bags Machine Washable?
Some Kelty sleeping bags have machine-washing instructions, but Kelty recommends spot cleaning and airing out a bag first. Careful hand washing is generally preferred when a full wash is necessary. Machine washing can damage insulation or internal seams, so always follow the specific care label and the manufacturer’s guidance.
What Is the Warranty Period for Kelty Sleeping Bags?
Kelty provides a limited lifetime warranty against qualifying manufacturing defects in materials and workmanship. The coverage applies to the reasonable lifetime of the product, not the owner’s lifetime. It generally requires an original purchase from an authorized seller. Normal wear, improper care, and accidental damage are excluded.
Do Kelty Sleeping Bags Come With Compression Sacks?
Several Kelty models include compression stuff sacks, including the Cosmic Synthetic range. Other models may include a regular stuff sack. Check the accessories listed for the exact sleeping bag you choose. A compression sack helps during travel but should not be used for long-term storage.
How Do I Properly Store a Kelty Sleeping Bag?
Store your sleeping bag completely dry and uncompressed. Use a large breathable storage sack or hang it in a suitable dry location. Avoid leaving the bag packed tightly between trips, because prolonged compression can reduce insulation loft and affect warmth.
Are Kelty Sleeping Bags Suitable for Extreme Cold Conditions?
Some Kelty models have colder temperature ratings, including the Mistral 0. However, the rating alone does not establish suitability for every extreme-cold situation. Your sleeping pad, shelter, clothing, and expected weather are essential parts of the sleep system. Choose equipment with an appropriate safety margin.
Which Kelty Sleeping Bag Is Best for Backpacking?
The right choice depends on the temperatures you expect. The Cosmic Synthetic 40 is suitable for milder trips where lower weight matters. The Cosmic Synthetic 20 offers a cooler temperature rating with synthetic insulation. Compare the weight and packed size of the exact version before making your decision.
Are Down Sleeping Bags Better Than Synthetic Sleeping Bags?
Neither insulation type is better for every situation. Down is generally more compressible and offers an excellent warmth-to-weight ratio. Synthetic insulation is practical when moisture is a concern and often requires simpler care. Consider the expected weather, carrying distance, and your willingness to maintain down insulation.
Can Two Kelty Sleeping Bags Be Zipped Together?
Some Kelty sleeping bags are designed to connect with compatible bags. The Galactic and Supernova ranges include models with this feature. Compatibility depends on the specific model and zipper configuration. Check the manufacturer’s description before buying two bags for use as a double sleeping bag.
Final Verdict: Best Kelty Sleeping Bags
The best Kelty sleeping bag is the one that matches your climate, packing needs, and preferred sleeping position. The Mistral 0 Long offers substantial synthetic insulation for colder trips, while lighter models make more sense when temperatures are mild.
For warmer backpacking trips, consider the Kelty Cosmic Synthetic 40. If you prefer a roomier down-filled bag, compare the Kelty Galactic Down 30.
