Kelty Cosmic Down 20 Sleeping Bag is once again at the top rank in the content of best budget backpacking sleeping bags. It is a portable, lightweight, warm, and high-quality bag. Due to its ultra-premium quality, durability, and adaptability, it is perfect for every season. According to my tests, it is warmer than a lot of 30°F or 40°F bags, which makes it a most suitable choice for you during chilly evenings when you need more warmth.
View at Amazon: Kelty Cosmic Down 20
It provides a high level of insulation, ideal for all three seasons. The main drawback of this sleeping bag is its down insulation. When it becomes wet, it loses effectiveness, which could be an issue when hiking in humid or rainy weather.
Performance Comparison and Testing Results
Warmth
Kelty Cosmic bag is filled with 550-fill power-down insulation. It is best for warm to moderately cold seasons, which include spring, summer, and fall. It keeps the user warm in temperatures as low as 20°F. This bag fills power and offers a good balance between warmth and weight as compared to other sleeping bags.
Even though it might not provide the same loft as those of higher fill power, it does perform well by keeping heat at cold weekends. In my tests, 18 ounces of insulation performed accurately within this bag. It offers warmth like bags rated for low temperatures. To get the most out of your Kelty Cosmic Down, we recommend reading our tips on How to Store a Sleeping Bag and preserve its down fill over time.
Comfort
The quality that makes Kelty Cosmic Down better than other competitors is its comfort. It is a bit spacious for a mummy bag. A person with any body type can sleep in it easily.
It provides enough space from head to toe, allowing you to sleep on your back or side. The bag provide enough comfort; Still, there are some cold patches.
Its bottom limit temperature is 19 degrees, but you can feel uncomfortable, particularly around the feet, so you must carry extra layers.
The Cosmic Ultra 20 sleeping bag weighs 2 pounds, 5.6 ounces for regular and 2 pounds, 14 ounces for long, which makes it heavier than ultralight options and uses a lower warmth-to-weight ratio. Despite its weight, it is the best choice for short backpacking journeys.
The bag is easy to pack and carry, and if weight is an issue but the budget is rigid, you can add a lightweight sleeping pad to balance the weight.
The hood is small, but it has a solid draft tube that aids in stopping cold air from entering the two sliding locking zippers. The draft collar gives this bag a furnace-like appearance and helps in keeping your head warm.
The outer shell of this sleeping bag consists of thick 20-denier nylon, which adds to its weight. Extra space increases the weight of the sleeping bag. So, it might be a bit heavier to carry and store.
However, it has a longer lifespan compared to 10D and 15D materials used in other bags, which means that Kelty bags are long-lasting.
For comfort and longevity, a bit of extra weight is a fair trade for campers. Therefore, the bag weight might be a disadvantage, but its price and durability make it the perfect choice for ultralight hikers.
Features
While doing the Kelty Cosmic Down 20 reviews, I found these key features that improve its performance.
- Insulation and warmth retention:
It is filled with 550 powers down. It provides warmth till the temperature of 20°F, which helps to keep you warm on chilly evenings.
- Compressibility and Packability:
Kelty 20-degree Sleeping bags are compressed completely into the stuffed sack and are slightly larger in size when compared to the other higher-filled bags. These bags’ packability might not be suitable for ultralight, but they are the best choice for normal camping.
- Outer Fabric Durability and Water Resistance:
The outer shell of these bags is not waterproof, but it can manage moderate moisture like dew because of its durable water-repellent finish, which consists of 20-denier nylon. This material is suitable for regular use but might need extra protection in heavy rain.
- Hood Design and draft collar features:
The adjustable hood provides adequate warmth retention around the head but lacks a full draft collar, which might result in a slight draft in lower temperatures. The draft tube with the zipper minimizes heat loss.
- Zipper features and Overall accessibility:
The full-length, anti-snag zipper makes it easy to enter and leave, and a draft tube along the zipper line keeps you warm.
These features provide comfort, increase accessibility, and provide efficiency to the campers.
Packability and Weight
Kelty Cosmic Down 20 Sleeping Bag is 550-fill insulation. It is the best choice for spring, autumn, and fall. The size of this bag is 9X 16 inches, and weight is 2.5 pounds.
It is a bit bulky, which can be problematic for hikers who are looking for an ultralight option. It has an improper stuff sack-like shape, which is perfect for short trips and camping.
I suggest buying a separate quality stuff sack. It is both comfortable and cost-effective.
It provides a perfect balance between weight, packability and warmth, especially for those who don’t want to sacrifice insulation for a few kilograms of weight.
Construction Quality
The Kelty Cosmic Down 20 Sleeping is constructed by keeping durability and material in mind. This bag is long-lasting as it consists of 20-denier nylon, which provides a lightweight and durable barrier.
Kelty Cosmic 20 compressed size is perfect for camping and other outdoor activities. Its outer layer has a water-repellent finish, which aids in avoiding light moisture and keeps the insulation dry in damp situations.
The soft lining on the inner side of the bag promotes a cozy sleeping environment to offer extra comfort against the skin. It has perfect stitching and high quality. Zippers play a significant role in sleeping bag construction. Cosmic 20 has a full-length anti-snag zipper that works smoothly and avoids snags that might damage the durability.
The baffles are designed in a way that they can move the down insulation by increasing warmth retention. But it reduces cold patches.
Overall, this sleeping bag has a balanced manufacturing quality, combining longevity, comfort, and crucial design factors that attract casual campers and those looking for reliable products on various sites.
Pros and Cons
During the Kelty Cosmic 20 review, I found some pros and cons you must know before buying.
Advantages of Kelty Cosmic 20
There are three main advantages of this sleeping bag.
- Lightweight and Packable:
This bag focuses on warmth and weight equally. This 2-pound lightweight backpack is perfect for camping trips and is compressed well into its stuffed sack, which makes it a popular choice for hikers and car campers.
- Effective Insulation:
This bag, with 550-fill-down warmth and a draft tube for mild temperatures, provides constant warmth for three-season hiking at an affordable price.
- User-Friendly Features:
It is an easy-to-use outdoor camping bag with features like a draft tube for warmth preservation, an adjustable hood, and an anti-snag zipper.
Disadvantages of Kelty Cosmic 20
There are two disadvantages of this sleeping bag as follows.
- Potential issues with Durability:
This bag may not be perfect for heavy wear like thicker or reinforced material, and its 550-fill-down insulation may lose loft rapidly.
- Price point consideration:
The Cosmic Down 20 is a reasonably priced sleeping bag, but it might fail to deliver the same level of durability and performance as a higher-end one. Ultralight backpackers may select higher-end models that include full draft collars and water-proofing treatments.
Should You Buy Cosmic Down 20 Sleeping Bag?
After the Kelty Cosmic 20 Synthetic review, I find that it is the best choice for campers having a limited budget. It is also the best choice for those who need this bag for three seasons. It is rated at 20°F and provides consistent warmth, good packability, and user-friendly features, making it useful for camping in cold weather.
This bag is suggested for casual outdoor lovers who prefer comfort and affordability over small requirements. The Cosmic Down 20 offers a great balance between cost and efficiency, though they lack some durability when compared to higher-end choices. In conclusion, it is a durable, entry-level down bag that meets the demands of a lot of campers without costing a premium.
What Other Backpacking Sleeping Bags Should You Consider?
While considering substitutes to the Kelty Cosmic Down 20, the Therm-a-Rest Questar and Rab Ascent Down Sleeping Bag stand out for their unique features, pricing, and performance.
Therm-a-Rest Quester
This bag is specially designed with 650-fill Nikwax Hydrophobic Down, zoned insulation, and an adjustable Synergy Link System to provide versatility and comfort. It offers better moisture resistance and comfort, which makes it suitable for moisture areas and backpackers looking for all-weather performance.
Rab Ascent Down Sleeping Bag
With 650-fill European duck down, a lightweight Pertex Quantum shell, and high-quality construction, the Rab Ascent is a multi-day travel kit that is perfect for professional hikers and climbers, particularly those who live in cold climates.
Both options provide added warmth and weather resistance than the Kelty Cosmic 20, with an emphasis on durability and performance in difficult situations. But both Therm-a-Rest Questar and Rab Ascent Down sleeping Bags are more expensive than Kelty Cosmic Down 20.
Related: Down vs. Synthetic Sleeping Bag
