Kelty Cosmic 20 Down Mummy Sleeping Bag
for Backpacking, Campers, 550 Fill Power, Recycled Fabrics with PFAS-Free DWR, Designed in Sunny Colorado…
Price as of 2026-06-08. Check Amazon for the current price.
Quick Decision
Price Intelligence
Is This Right For You?
- •Buyers who prioritize quality over price in Sleeping Bags
- •Those who want a top-rated option — in the top 6% of Sleeping Bags by rating
- •Kelty loyalists — the brand spans 27 products in our database
- •You're on a tight budget — $125 above the category average of $65
- •Kingfun 3 Inch CertiPUR-US Memory Foam Camping Mattress Pad — 58% cheaper at $80 (Score B-)
📊 Based on data analysis of 110 products in this category.
Mubboo Score: C+
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 · last refreshed 2026-06-08.
How It Compares
This Product Kelty Cosmic 20 Down Mummy Sleeping Bag | Most Popular TETON Sports Teton Outfitter XL Sleeping Pad | Best Rated Coleman Heritage Big & Tall 10°F Flannel Sleeping Bag | Best Value Kingfun 3 Inch CertiPUR-US Memory Foam Camping Mattress Pad | |
|---|---|---|---|---|
| Price | $189.90 | $105.49 | $82.99 | $79.99 |
| Rating | 4.7/5 | 4.6/5 | 4.7/5 | 4.6/5 |
| Reviews | 254 | 4,191 | 3,772 | 1,138 |
| Mubboo Score | C+ | B | B | B- |
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
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
Other Sleeping Bags
Bottom Line
Kelty Cosmic 20 Down Mummy Sleeping Bag earns Mubboo Score C+. Priced at $190 — a premium option, above the category average of $65. Rated 4.7/5 from 254+ reviews. Strong buy if: buyers who prioritize quality over price in sleeping bags, those who want a top-rated option. Skip if: you're on a tight budget — TETON Sports Teton Outfitter XL Sleeping Pad (Score B, $105) may fit better.
Frequently Asked Questions
Is the Kelty Cosmic 20 Down Mummy Sleeping Bag worth buying in 2026?
It earns a Mubboo Score of C+, with a 4.7/5 rating from 254 reviews — better than 94% of Sleeping Bags we track.
How much does the Kelty Cosmic 20 Down Mummy Sleeping Bag cost?
It is currently $189.90 — premium-tier pricing for Sleeping Bags.
How does the Cosmic 20 Down Mummy Sleeping Bag compare to other Sleeping Bags?
The category's most-reviewed alternative is the TETON Sports Teton Outfitter XL Sleeping Pad (4.6/5, 4,191 reviews, $105.49). The Cosmic 20 Down Mummy Sleeping Bag carries a Mubboo Score of C+ vs B.
Sources & References
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 (2026-06-08) and may change.