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Best Down Fill Sleeping Bags

Premium warmth-to-weight ratio, highly compressible, and built to last for years

Showing 8 down sleeping bags

800 Fill Power Kelty Cosmic 0 Ultra
Kelty

Cosmic 0 Ultra 4-Season Down Mummy Sleeping Bag

0°F Rating 800 Fill DriDown 2 lbs 13 oz
★★★★★ 4.6 (245 reviews)

Premium 800 fill DriDown with trapezoidal baffle construction for maximum warmth. Sustainably sourced materials.

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Women's Fit Kelty Women's Cosmic Ultra
Kelty

Women's Cosmic Ultra 20 Deg 800 DriDown

20°F Rating 800 Fill DriDown 2 lbs
★★★★★ 4.5 (312 reviews)

Women's-specific fit with 800 fill DriDown and trapezoidal baffle construction for improved warmth.

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Best Seller Kelty Cosmic 20
Kelty

Cosmic 20 Degree 550 Down Fill Sleeping Bag

20°F Rating 550 Fill Down 2 lbs 6 oz
★★★★★ 4.7 (1,890 reviews)

Premium thermal efficiency with recycled PFAS-free materials. Compression stuff sack included.

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650 Fill Power Marmot Women's Teton
Marmot

Women's Teton 15° Sleeping Bag 650 Fill Down

15°F Rating 650 Fill Down 2 lbs 13 oz
★★★★★ 4.7 (156 reviews)

Strategic down baffling with draft tube and hood. Dual side zips for temp regulation.

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Best Value TETON Altos
TETON Sports

Altos 0 Degree Lightweight Mummy Sleeping Bag

0°F Rating Down Fill 3 lbs 2 oz
★★★★★ 4.5 (890 reviews)

Water-resistant down that's lightweight and highly compressible. Bigger than industry standard.

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600 Fill Power Kelty Galactic 30
Kelty

Galactic 30 Deg 600 DriDown Backpacking

30°F Rating 600 Fill DriDown 2 lbs 3 oz
★★★★☆ 4.4 (423 reviews)

600 fill DriDown treated for water resistance. Perfect balance of warmth and packability.

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Hybrid Design Klymit KSB
Klymit

KSB Lightweight Mummy Sleeping Bag 20°F

20°F Rating 650 Down/Synthetic 2 lbs 13 oz
★★★★★ 4.5 (567 reviews)

650 power fill down on top with synthetic batting beneath for 3-season comfort.

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Hewolf Down
Hewolf

Down Sleeping Bag Mummy Cold Weather Backpacking

Cold Weather 800g Down Fill 2.5 lbs
★★★★☆ 4.3 (189 reviews)

Lightweight waterproof down bag with compression sack. Excellent warmth-to-weight ratio.

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Why Choose Down Fill?

Down insulation offers the best warmth-to-weight ratio of any sleeping bag fill. It's highly compressible, incredibly warm, and when properly cared for, can last for decades.

Understanding Fill Power

Fill power measures the loft (fluffiness) of down. Higher fill power means more warmth with less weight:

  • 550-600 Fill: Good quality, budget-friendly option
  • 650-700 Fill: Better warmth-to-weight, mid-range price
  • 800+ Fill: Premium quality, best for ultralight backpacking

Pros of Down

  • Best warmth-to-weight ratio
  • Highly compressible
  • Extremely durable (lasts decades)
  • Breathable and comfortable
  • Natural material

Cons of Down

  • Loses insulation when wet
  • Takes longer to dry
  • More expensive
  • Requires careful cleaning
  • Not suitable for humid climates
Pro Tip: Look for "DriDown" or "hydrophobic down" which is treated to resist moisture, addressing down's biggest weakness.