Kelty · Updated June 2026

Cosmic Down 20 Sleeping Bag: price, specs & release date

Name: Cosmic Down 20 Sleeping Bag
Brand: Kelty
Price: 189.95 USD
Availability: InStock

Cosmic Down 20 Sleeping Bag, released 2024. Every price and spec below is linked to its source and dated — no guesses.

Source: kelty.com verified 2026-06-27 ✓ corroborated verify in ledger

The Cosmic Down 20 Sleeping Bag is listed at $189.95 on kelty.com as of 2026-06-27, #6 cheapest of 17 sleeping bags (median $200); other retailers may be lower. It earns a Silver Deskmark — 71/100 pay-blind standing, #4 of 13 in class.

Verified Jun 27, 2026 · figures linked to their source in the table below

Cheapest sleeping bags: Brazos 20F Sleeping Bag — $59

See Cosmic Down 20 Sleeping Bag on Amazon Live price at the store — may differ from the dated listed price above. As an Amazon Associate we earn from qualifying purchases.

Best for Excellent warmth-to-weight ratio and cozy, buttery-soft lining; Strong value / affordable for a down bag.
Skip if Heavy and bulky for a backpacking-specific down bag is a dealbreaker.

Cosmic Down 20 Sleeping Bag — Kelty — Image: kelty.com (© Kelty)

Is the Cosmic Down 20 Sleeping Bag a good buy?

At $190, the Cosmic Down 20 Sleeping Bag is #5 cheapest of the 17 sleeping bags we track, where the median is $249.95. On the spec sheet, its fill power of 550 is the lowest of the 11, its temperature rating f of 20 is at the median of the 19, and its packed weight of 2.44 lb is at the median of the 13.

Evidence of Record

Our data

Independent labsmeasured it: 1
Physical metricsrecorded: 1
Outlets on record1 tested · 1 mention-only: 2

One independent lab measured this product across 1 physical metric — tester-observed comfortable warmth. These numbers rest on a single hands-on source so far; 1 other outlet has it on record by mention only.

A coverage record, not a rating. How we count

Review consensus · sourced & dated

What reviewers say about the Cosmic Down 20 Sleeping Bag

Based on 2 reviews · 2 lab-tested · 2025-04-23–2026-03-19

Tested by CleverHiker, Switchback Travel

Consistently praised

Excellent warmth-to-weight ratio and cozy, buttery-soft lining · 2 sources
Strong value / affordable for a down bag · 2 sources
Draft collar/tubes and adjustable hood seal in heat well for 3-season use · 2 sources
Smooth, snag-free zipper and solid, durable build for the price · 2 sources

Commonly flagged

Heavy and bulky for a backpacking-specific down bag · 2 sources
Large price and weight gap between women's and unisex versions · 2 sources
Narrow mummy fit limits room to spread out
No mesh storage sack included

Where reviewers disagree Packability is the main split: CleverHiker calls the Cosmic Down the 'smallest of any model on our guide' and praises how small it packs (men's 2 lb 7 oz), while Switchback, testing the heavier women's version (3 lb 2.1 oz), found the 550-fill down 'doesn't compress nearly as well' and rated the packed size bulky at 'just over 13 liters,' roughly two volleyballs.

The sources (2)

CleverHiker lab-tested · 2025-04-23

tester-observed comfortable warmth limit (vs 20F spec): 30°F

this one has a stellar warmth-to-weight ratio, making it a standout on our best sleeping bags for camping guide

Our testing finds the 550-fill down insulation kept us toasty warm to 30°F

this bag's narrow fit might not be the best if you prefer more room to spread out

Switchback Travel lab-tested · 2026-03-19

this bag felt undeniably cozy and punched well above its weight and price class in terms of immediate "sink-in" comfort

the combination of the draft collar and cinchable hood did a great job of sealing in my body heat

High weight and large packed size make this bag well-suited only for short backpacks or car camping.

Specifications

Price (US)	$189.95 MSRP, regular size, per kelty.com
Brand	Kelty
Released	2024
Temperature rating f	20
Insulation type	down
Fill power	550
Shape	semi-rectangular
Packed weight (lb)	2.44
Packed size	8 x 13 in
Zipper side	right
Product note	550-fill DriDown; ISO comfort 31F, lower limit 21F; regular weight 2 lb 7 oz

Source: kelty.com (verified 2026-06-20) · corroborated by switchbacktravel.com. Verified: 20F rating, 550 DriDown fill power, semi-rectangular shape, regular weight 2 lb 7 oz (2.44 lb), packed size 8x13 in, and MSRP ~$190 confirmed via kelty.com and corroborated by Backpacking Light and Switchback Travel reviews. Right-hand zipper per retailer listings. ISO comfort 31F / lower limit 21F.

Is the Cosmic Down 20 Sleeping Bag worth it vs cheaper sleeping bags?

Cosmic Down 20 Sleeping Bag against its closest cheaper and pricier sleeping bags on the specs that matter — every value sourced. See all 17 ranked

Product	Price	Temperature rating f	Insulation type	Fill power	Shape	Packed weight (lb)
Cosmic Down 20 Sleeping Bag this	$189.95	20	down	550	semi-rectangular	2.44
Solar Eco 3 Sleeping Bag	$180	20	synthetic	—	mummy	—
Forte Endless Promise Men's Synthetic Sleeping Bag 20F	$199.95	20	synthetic	—	spoon	—

Frequently asked questions

What do reviewers say about the Cosmic Down 20 Sleeping Bag?

Two whitelisted hands-on testers (CleverHiker, Switchback Travel) reviewed the Kelty Cosmic Down 20 and both call it a strong-value budget 3-season down bag. Both praise its warmth-to-weight ratio, buttery-soft lining, and low price, and both flag it as heavy and bulky for a backpacking-specific bag while noting the large gap between the women's and unisex versions. CleverHiker's tester observed comfortable warmth to 30F against the 20F spec. All six quotes and the one measured value were verified as literal substrings of the fetched source text. Praised: Excellent warmth-to-weight ratio and cozy, buttery-soft lining; Strong value / affordable for a down bag; Draft collar/tubes and adjustable hood seal in heat well for 3-season use; Smooth, snag-free zipper and solid, durable build for the price. Flagged: Heavy and bulky for a backpacking-specific down bag; Large price and weight gap between women's and unisex versions; Narrow mummy fit limits room to spread out; No mesh storage sack included. (From 2 tester reviews, 2 lab-tested.)

How much does the Cosmic Down 20 Sleeping Bag cost?

The Cosmic Down 20 Sleeping Bag has a US price of $189.95 (MSRP, regular size, per kelty.com), as of 2026-06-20.

How does the Cosmic Down 20 Sleeping Bag compare on price?

At $190, the Cosmic Down 20 Sleeping Bag is #5 cheapest of the 17 sleeping bags we track, where the median is $249.95.

When was the Cosmic Down 20 Sleeping Bag released?

The Cosmic Down 20 Sleeping Bag was released 2024.

What are the Cosmic Down 20 Sleeping Bag's key specs?

Cosmic Down 20 Sleeping Bag (Kelty): temperature rating f 20, insulation type down, fill power 550, shape semi-rectangular, packed weight lb 2.44. Full sourced spec sheet verified 2026-06-20.

Price of record: $189.95 at kelty.com, 2026-06-27. Other retailers may be lower — check the current price:

See Cosmic Down 20 Sleeping Bag on Amazon As an Amazon Associate we earn from qualifying purchases.

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Head-to-head

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Solar Eco 3 Sleeping Bag $180
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Brazos 20F Sleeping Bag $59

Step up

Forte Endless Promise Men's Synthetic Sleeping Bag 20F $199.95
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Disco Men's Endless Promise Down Sleeping Bag 15F $299.95
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