Ultralight / Backpacking

Spark Down Sleeping Bag

$349.00
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Highlights

Best Use: Ultralight Backpacking

Performance: Warm Climate

Weight: 12.8oz | 363g

Compressed Volume: 2.4L

Lower Temp Rating: 45°F | 7°C

Zipper Coupling: Half-Zipper, cannot be zipped to another sleeping bag. Learn more.

Performance
Weight:
  • Ultralight
  • Lightweight
  • Midweight
Packability:
  • Ultra Compact
  • Compact
  • Midsize
Climate:
  • Warm
  • Cold
  • Extreme Cold
About The Product

If you're counting grams, but still count on a great night's sleep, the Spark may be the right bag for you.

Filled with RDS-certified 850+ fillpower goose down treated with a non-PFAS Ultra-Dry Down treatment, the Spark is constructed with a technical hood and zipper draft tube to retain warmth. Comfort comes from a super-breathable 10 Denier liner fabric, while a 10D shell with a non-PFAS DWR plus a highly water repellent hood and footbox fabric shed wind and condensation.

The full-length zipper models can be zipped to an equivalent Women's Spark for comfort that couples can share

Product Features
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45°F / Regular || Spark Down Sleeping Bag

Spark Down Sleeping Bag 45°F / Regular

Description || Spark Down Sleeping Bag (0°F - 45°F)

If you're counting grams, but still count on a great night's sleep, the Spark may be the right bag for you.

Filled with RDS-certified 850+ fillpower goose down treated with a non-PFAS Ultra-Dry Down treatment, the Spark is constructed with a technical hood and zipper draft tube to retain warmth. Comfort comes from a super-breathable 10 Denier liner fabric, while a 10D shell with a non-PFAS DWR plus a highly water repellent hood and footbox fabric shed wind and condensation.

The full-length zipper models can be zipped to an equivalent Women's Spark for comfort that couples can share

Design Details

Smallest Packed Size

Ultralight bag compresses down to the smallest packed size to save space in your backpack.

Warmth-to-Weight Ratio

Our best sleeping bag for providing exceptional warmth without the added weight.

Premium Comfort

Comfortable, super-breathable and ultralight 10 Denier liner fabric.

Snag-Free Zipper Plow

YKK #5 zippers with zipper plow provide reliable, snag-free operation.

Technical Features

850+ Loft Ultra-Dry Down
Quiltlock System
Responsible Down Standard (RDS)
Non-PFAS

Tech specs

  • Best Use
    Ultralight Backpacking
  • Comes With
    40D recycled, bluesign APPROVED nylon compression bag
  • Insulation
    RDS certified, 850+ non-PFAS Ultra-Dry Down
  • Shape
    Mummy
  • Zip Options
    YKK #5 zippers with snag free zipper plow
45°F / Regular 45°F / Long 15°F / Double
45°F
Regular
45°F
Long
30°F
Regular
30°F
Long
15°F
Regular
15°F
Long
15°F
Double
0°F
Regular
0°F
Long
Weight12.8oz 363g13.7oz 387g1lb 1.4oz 493g1lb 2.9oz 536g1lb 9.7oz 730g1lb 11.7oz 786g3lbs 6.4oz 1543g2lbs 7.3oz 1113g2lbs 10.5oz 1204g
Fill Weight5.3 oz 150 g6.1 oz 172 g9.3 oz 265 g10.8 oz 305 g16.9 oz 480 g19.0 oz 540 g34.7 oz 985 g29.6 oz 840 g33.3 oz 945 g
Compressed Volume2.4 L2.4 L2.9 L2.9 L4.5 L4.5 L5.1 L5.1 L6.8 L6.8 L7.6 L7.6 L14.3 L14.3 L9.9 L9.9 L10.6 L10.6 L
Compression Sack2 L2 L3 L3 L8 L8 L8 L8 L13 L13 L13 L13 L20 L20 L20 L20 L20 L20 L
Temperature Rating (ISO Lower Limit)45°F 7°C45°F 7°C30°F -1°C30°F -1°C15°F -9°C15°F -9°C15°F -9°C0°F -18°C0°F -18°C
Women's Temp Rating (ISO Comfort)51°F 11°C51°F 11°C39°F 4°C39°F 4°C29°F -2°C29°F -2°C29°F -2°C14°F -10°C14°F -10°C
Fits Up To Height6 ft 1 in 185 cm6 ft 6 in 198 cm6 ft 1 in 185 cm6 ft 6 in 198 cm6 ft 1 in 185 cm6 ft 6 in 198 cm6 ft 6 in 198 cm6 ft 1 in6 ft 1 in6 ft 6 in 198 cm

Frequently Asked questions

Can I open a Spark flat for use as a quilt?

No - the ultralight Spark does not have a footbox zipper. For this feature, see the Spark Pro or Ascent sleeping bags

How much room is there in a Spark?

The Spark is designed to be ultralight, so the fit is a little more snug than a comfort-sleeping bag like the Ascent. But - it is still cut to provide room to move.

Can two Sparks be zipped together?

Any of the Spark/Women's Spark models with full-length zippers can be zipped together