Uploaded March 2023 | Updated September 2026, 3 weeks ago
The Kelty Cosmic Ultra 20° Down Sleeping Bag performed well in the last reading. Kelty Cosmic Ultra 20° Down Sleeping Bag was warm pretty evenly across the sleeping bag. The hood on the Kelty Cosmic Ultra 20° Down Sleeping Bag is horrible. It was digging into my nose/eyes. The Kelty Cosmic Ultra 20° Down Sleeping Bag is comfortable and I was pretty impressed. I would not take the Kelty Cosmic Ultra 20° Down Sleeping Bag below 22/23 degrees, but it handled it well!
Air Temp: 22° Degrees
Starting Temp In Bag: 38.8° Degrees
5 Minute Bag Temp: 58.6° Degrees
10 Minute Bag Temp: 67.1° Degrees
15 Minute Bag Temp: 71.6° Degrees
20 Minute Bag Temp: 74.1° Degrees
25 Minute Bag Temp: 75.5° Degrees
30 Min Bag Temp: 76.1° Degrees
35 Min Bag Temp: 76.4° Degrees
40 Min Bag Temp: 76.4° Degrees
45 Min Bag Temp: 76.8° Degrees
From Kelty:
"The Kelty Cosmic Ultra 20 is the ultimate in a lightweight mummy. We’ve taken our top-selling Cosmic Bag and added an 800 fill DriDown version, with all the perks too. The new trapezoidal baffle construction improves is ideal for retaining heat—and it’s just one of the reasons Cosmic is still our favorite three-season superstar. We also love the natural-fit foot box for happier feet, and a PFC-free water-repellent coating for a healthier environment."
Regular Size Specs :
Temperature Rating: 20.0°F / -7.0°C
ISO Comfort Rating: 31.0°F / -1.0°C
ISO Limit Rating: 20.0°F / -7.0°C
ISO Extreme Rating: -12.0°F / -24.0°C
Bag Shape: Mummy
Weight: 2.4 lbs / 1.09 kg
Fill Weight: 15.17 oz / 430.0 g
Fits To: 72.05" / 183.0 cm
Length: 77.95" / 198.0 cm
Shoulder Circumference: 62.2" / 158.0 cm
Hip Circumference: 57.87" / 147.0 cm
Foot Circumference: 40.16" / 102.0 cm
Stuff Sack Size: 8 x 13 in / 20 x 33 cm
Link to Bag:
kelty.com/cosmic-ultra-20
How I Test Sleeping Bags:
youtu.be/ANUlVxduN84
Previous Sleeping Bag Testing Videos:
youtube.com/watch?v=svzTs6cx9YA
youtube.com/watch?v=im_6J5WVEms
youtube.com/watch?v=09puLSAmU84
youtube.com/watch?v=_-EMsTBMVKg
youtube.com/watch?v=ISmnj3gy2-M
youtube.com/watch?v=c_qLHGQwAXE
youtube.com/watch?v=7yUvIj-aBZ8
youtube.com/watch?v=3c8lTg-rPWw
youtube.com/watch?v=P6PQsuV-OIQ
My Backpacking Gear Playlist:
youtube.com/playlist?list=PL40B4C58956B81A74
CATCH ME ON SOCIAL MEDIA:
facebook.com/CaptainBerz
twitter.com/CaptainBerz
instagram.com/captainberz
captainberz.com
The Kelty Cosmic Ultra 20° Down Sleeping Bag performed well in the last reading. Kelty Cosmic Ultra 20° Down Sleeping Bag was warm pretty evenly across the sleeping bag. The hood on the Kelty Cosmic Ultra 20° Down Sleeping Bag is horrible. It was digging into my nose/eyes. The Kelty Cosmic Ultra 20° Down Sleeping Bag is comfortable and I was pretty impressed. I would not take the Kelty Cosmic Ultra 20° Down Sleeping Bag below 22/23 degrees, but it handled it well!
Air Temp: 22° Degrees
Starting Temp In Bag: 38.8° Degrees
5 Minute Bag Temp: 58.6° Degrees
10 Minute Bag Temp: 67.1° Degrees
15 Minute Bag Temp: 71.6° Degrees
20 Minute Bag Temp: 74.1° Degrees
25 Minute Bag Temp: 75.5° Degrees
30 Min Bag Temp: 76.1° Degrees
35 Min Bag Temp: 76.4° Degrees
40 Min Bag Temp: 76.4° Degrees
45 Min Bag Temp: 76.8° Degrees
From Kelty:
"The Kelty Cosmic Ultra 20 is the ultimate in a lightweight mummy. We’ve taken our top-selling Cosmic Bag and added an 800 fill DriDown version, with all the perks too. The new trapezoidal baffle construction improves is ideal for retaining heat—and it’s just one of the reasons Cosmic is still our favorite three-season superstar. We also love the natural-fit foot box for happier feet, and a PFC-free water-repellent coating for a healthier environment."
Regular Size Specs :
Temperature Rating: 20.0°F / -7.0°C
ISO Comfort Rating: 31.0°F / -1.0°C
ISO Limit Rating: 20.0°F / -7.0°C
ISO Extreme Rating: -12.0°F / -24.0°C
Bag Shape: Mummy
Weight: 2.4 lbs / 1.09 kg
Fill Weight: 15.17 oz / 430.0 g
Fits To: 72.05" / 183.0 cm
Length: 77.95" / 198.0 cm
Shoulder Circumference: 62.2" / 158.0 cm
Hip Circumference: 57.87" / 147.0 cm
Foot Circumference: 40.16" / 102.0 cm
Stuff Sack Size: 8 x 13 in / 20 x 33 cm
Link to Bag:
kelty.com/cosmic-ultra-20
How I Test Sleeping Bags:
youtu.be/ANUlVxduN84
Previous Sleeping Bag Testing Videos:
youtube.com/watch?v=svzTs6cx9YA
youtube.com/watch?v=im_6J5WVEms
youtube.com/watch?v=09puLSAmU84
youtube.com/watch?v=_-EMsTBMVKg
youtube.com/watch?v=ISmnj3gy2-M
youtube.com/watch?v=c_qLHGQwAXE
youtube.com/watch?v=7yUvIj-aBZ8
youtube.com/watch?v=3c8lTg-rPWw
youtube.com/watch?v=P6PQsuV-OIQ
My Backpacking Gear Playlist:
youtube.com/playlist?list=PL40B4C58956B81A74
CATCH ME ON SOCIAL MEDIA:
facebook.com/CaptainBerz
twitter.com/CaptainBerz
instagram.com/captainberz
captainberz.com
