Kelty Cosmic Down 20
Specifications
| Weight | Packed Size (L) | Warmth Rating | Fill Weight | Fill Power | Fill Type | Sleeper Height | Seasons | Shape | MSRP |
|---|---|---|---|---|---|---|---|---|---|
| 2 lbs 7 oz | 12 | 20°F | 16 oz | 550 | Duck Down | Up to 6 ft (Regular) | 3-season | Mummy | $179.95 |
Comfort & Warmth
The Kelty Cosmic Down 20 is designed to deliver dependable three-season warmth with a focus on comfort that appeals to both new and experienced backpackers. Its 550-fill-power, RDS-certified duck down provides consistent insulation, while the trapezoidal baffle construction minimizes cold spots and maximizes loft for better thermal efficiency. A natural-fit footbox gives your feet room to rest in a relaxed position without compressing the insulation, helping keep toes warm on chilly nights. The soft, 20-denier recycled nylon taffeta shell and liner create a smooth, comfortable feel against the skin, and features like the insulated draft tube along the zipper and a zippered internal stash pocket add both warmth retention and convenience. With a temperature rating of 20°F, the Cosmic Down 20 is built to keep most sleepers comfortable on cold spring, fall, and shoulder-season trips, while remaining versatile enough for milder conditions thanks to its breathable construction.
Weight & Packability
The Kelty Cosmic Down 20 delivers solid warmth in a reasonably packable package, weighing in at about 2 lbs 7 oz for the regular size. While it’s not in the ultralight category, its 550-fill-power down still compresses well, allowing it to fit into the included 13 x 8 inch stuff sack for easy storage in most mid-sized backpacks (can be further compressed). The 20-denier recycled nylon shell helps keep overall weight manageable while adding durability for repeated trips. Its slightly bulkier packed size compared to premium ultralight bags is the trade-off for its more affordable price point, but for many backpackers, especially those not counting every ounce, the balance of warmth, comfort, and respectable compressibility makes it a trail-worthy companion for three-season adventures.
Price
Priced at around $180 for the regular size, the Kelty Cosmic Down 20 stands out as one of the most affordable down sleeping bags on the market, offering reliable three-season performance at a fraction of the cost of many competitors. Despite its budget-friendly price, it features 550-fill-power RDS-certified duck down, a 20-denier recycled nylon shell and liner, and thoughtful warmth-retaining touches like a draft tube and trapezoidal baffle construction - features often reserved for pricier bags. This approachable price point makes it an excellent entry into the world of down insulation for newer backpackers or a cost-effective backup bag for seasoned hikers. For campers willing to carry a few extra ounces and a slightly bulkier pack size, the Cosmic Down 20 delivers a strong balance of warmth, comfort, and durability without straining your gear budget.
Quality & Materials
The Kelty Cosmic Down 20 combines durable construction with practical, good-value materials designed to perform well in a variety of three-season conditions. Its insulation comes from 550-fill-power duck down that is Responsible Down Standard (RDS) certified, ensuring ethical sourcing while delivering dependable loft and warmth retention. The 20-denier recycled nylon taffeta shell and liner provide a soft, comfortable feel against the skin while resisting wear from repeated packing and use. Trapezoidal baffle construction helps keep the down evenly distributed to prevent cold spots, while the draft tube and natural-fit footbox enhance heat retention and sleeping comfort. While the materials aren’t as ultralight or high-fill as those found in premium models, they strike a smart balance between cost, durability, and real-world performance—making the Cosmic Down 20 a long-lasting and dependable option for budget-conscious backpackers.
Consumer Sentiment: Pros & Cons
Pros:
- Exceptional warmth-to-weight ratio for the price
- Solid feature set including insulated sections, stash pocket, and quality zipper
- Value-focused design using recycled materials and quality down
Cons:
- Shell and draft tube could be more durable
- Slightly heavy and bulkier than premium designs like Feathered Friends or Western Mountaineering
Comparison to Similar Items
Feathered Friends Swallow UL 20:The Swallow UL 20 is lighter, and uses higher-fill down for superior packability, while the Cosmic Down 20 trades some performance for a far more budget-friendly price.
NEMO Disco 15: The Disco 15 is warmer, roomier, and packed with comfort features for side sleepers, but it’s heavier and more expensive than the Cosmic Down 20
REI Co-op Magma 30: The Magma 30 is lighter, more compact, and made with higher-quality down, whereas the Cosmic Down 20 offers more warmth for colder nights at a significantly lower price.
Who It’s Intended For
The Kelty Cosmic Down 20 is ideal for backpackers, budget-conscious thru-hikers, and occasional campers who want dependable 20 °F performance without spending premium dollars. It suits those needing a comfortable bag who don’t mind a touch of extra bulk for the value.
