Kelty Cosmic Synthetic Fill 20 Degree Backpacking
Sleeping Bag, Regular – Compression Straps, Stuff Sack Included (2025)
Price as of 2026-06-02. Check Amazon for the current price.
Quick Decision
Price Intelligence
- Budget:$9–$30
- Mid-range:$30–$76
- Premium:$76+← You are here
Is This Right For You?
- •Buyers who prioritize quality over price in Sleeping Bags
- •Kelty loyalists — the brand spans 27 products in our database
- •You're on a tight budget — $18 above the category average of $65
- •WIWIGO Beach Mat offers a better rating (4.6/5) at a similar or lower price ($33)
- •WIWIGO Beach Mat — 60% cheaper at $33 (Score A-)
- •Coleman Heritage Big & Tall 10°F Flannel Sleeping Bag — higher rated at 4.7/5 ($83)
📊 Based on data analysis of 110 products in this category.
Mubboo Score: B-
How we calculate the Mubboo Score
Quality (45%): customer rating, normalized to a 10-point scale
Popularity (35%): review volume vs the category leader, log-scaled
Value (20%): price position vs other Sleeping Bags
Computed from live Amazon rating, review count, and price across 110 Sleeping Bags available to US consumers · last refreshed 2026-06-02.
How It Compares
This Product Kelty Cosmic Synthetic Fill 20 Degree Backpacking | Most Popular Sleepingo Lightweight Sleeping Mat 2-Pack | Best Rated Coleman Heritage Big & Tall 10°F Flannel Sleeping Bag | Best Value WIWIGO Beach Mat | |
|---|---|---|---|---|
| Price | $82.46 | $54.99 | $82.99 | $32.99 |
| Rating | 4.4/5 | 4.3/5 | 4.7/5 | 4.6/5 |
| Reviews | 526 | 34,762 | 3,772 | 6,017 |
| Mubboo Score | B- | A- | B | A- |
Quick Specs
- Size
- Standard
- Color
- Dark Blue
- Shape
- Mummy
- Seasons
- 3 Seasons
- Material
- Nylon
- Occupancy
- 1 Person
- Unit Count
- 1.0 Count
- Fabric Type
- [face fabric] 380T nylon taffeta, [lining] 50D 300T polyester taffeta
What People Say
Synthesized from 40 reviews · 100% verified purchases.
Check inflatable pad valves for leaks before trips. Be prepared for sleeping bag zippers that may snag and a potentially too-warm interior; a liner can help with stickiness.
- Lightweight & compact
- Comfortable & pain-free
- Great value
- Easy inflation/deflation
- Good warmth retention
- Valve air leak
- Zipper snags/sticks
- Difficult to repack
- Too hot/sticky interior
Key Features
- ✦[face fabric] 380T nylon taffeta
- ✦Imported
- ✦20 Degree Temp Rating, Regular Size: Fits sleepers up to 6ft, fill weight 30. 5oz, total weight 2lbs 13oz, stuff size (non-compressed) 16x9 inches. Color: Tapestry Blue/Smoke
- ✦Packability: Integrated compression stuff sack, coupled with the premium packability of the synthetic fill allow the Cosmic synthetic to reach minimalist standards of backpacking g…
- ✦Insulation: Cirroloft synthetic insulation provides reliable warmth in cold and damp conditions, maintains loft for even coverage with no cold spots. Temperature ratings from 0 deg…
Source: product listing on Amazon.
About Kelty
- 27 products in our database
- Average rating: 4.5/5 across all products
- Price range: $34.94 – $399.95
- Categories: Baby Carriers, Camping Chairs, Camping Tents, Hammocks, Hiking Backpacks, Mattresses
If not the Cosmic Synthetic Fill 20 Degree Backpacking, consider these
Bottom Line
Kelty Cosmic Synthetic Fill 20 Degree Backpacking earns Mubboo Score B-. Priced at $82 — a premium option, above the category average of $65. Rated 4.4/5 from 526+ reviews. Strong buy if: buyers who prioritize quality over price in sleeping bags, kelty loyalists. Skip if: you're on a tight budget — Sleepingo Lightweight Sleeping Mat 2-Pack (Score A-, $55) may fit better.
Frequently Asked Questions
Is the Kelty Cosmic Synthetic Fill 20 Degree Backpacking worth buying in 2026?
It earns a Mubboo Score of B-, with a 4.4/5 rating from 526 reviews — better than 37% of Sleeping Bags we track.
How much does the Kelty Cosmic Synthetic Fill 20 Degree Backpacking cost?
It is currently $82.46 — premium-tier pricing for Sleeping Bags.
How does the Cosmic Synthetic Fill 20 Degree Backpacking compare to other Sleeping Bags?
The category's most-reviewed alternative is the Sleepingo Lightweight Sleeping Mat 2-Pack (4.3/5, 34,762 reviews, $54.99). The Cosmic Synthetic Fill 20 Degree Backpacking carries a Mubboo Score of B- vs A-.
Sources & References
Products available through US retailers. Prices in USD. Sales tax varies by state and is not included.
Mubboo may earn a commission on purchases made through affiliate links. This does not affect our Mubboo Score, product rankings, or editorial judgments. Prices are accurate as of the last sync (2026-06-02) and may change.