Kelty Cosmic Synthetic Fill 20 Degree Backpacking Sleeping Bag
Camping & OutdoorBackpacking, bike camping, and minimalist three-season adventures

Kelty Cosmic Synthetic Fill 20 Degree Backpacking Sleeping Bag

$99.95
★★★★4.3(650 reviews)

The Kelty Cosmic Synthetic 20 is a lightweight 3-season backpacking sleeping bag made from 100% recycled fabrics and CirroLoft ECO insulation. At just 2 lbs 6 oz (regular), it strikes the perfect balance between packability and warmth. Rated to 20°F with an ISO comfort rating of 32°F. Features a durable nylon shell, silky taffeta liner, zippered stash pocket, and integrated compression stuff sack.

Check Latest Price on Amazon →

Why You Need This

Your current sleeping bag takes up half your backpack and weighs more than your tent. You need something that won't break your back — or your budget — on multi-day treks.

Pros & Cons

✅ Pros

  • Ultra-light at 2 lbs 6 oz — competitive with down bags at half the price
  • 100% recycled fabrics and fill — sustainable choice
  • CirroLoft ECO insulation retains warmth when damp
  • Compression stuff sack included for compact packing

❌ Cons

  • Snug fit in the shoulders — not ideal for broad-shouldered sleepers
  • Synthetic insulation loses loft faster than down over time
  • 20°F rating is survival, not comfort — best above 32°F

🎯 Who Is This For?

W
e
i
g
h
t
-
c
o
n
s
c
i
o
u
s
b
a
c
k
p
a
c
k
e
r
s
a
n
d
e
c
o
-
m
i
n
d
e
d
c
a
m
p
e
r
s
w
h
o
w
a
n
t
d
o
w
n
-
l
i
k
e
p
e
r
f
o
r
m
a
n
c
e
w
i
t
h
o
u
t
t
h
e
p
r
i
c
e
o
r
e
t
h
i
c
a
l
c
o
n
c
e
r
n
s

Ready to Buy?

Check the latest price and availability on Amazon. Prices are accurate as of the date listed and may change over time.

Check Latest Price on Amazon →