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Spark Ultralight Sleeping Bag

Spark Ultralight Sleeping Bag

$269.00-$589.00
Engineered to keep you warm at the lightest weight and smallest compressed size+ View tech specs
Temp Rating
Size
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Highlights

BEST USE: Ultralight Backpacking

PERFORMANCE: 2 Season

WEIGHT: 1lb 1.3oz | 490g

COMPRESSED VOLUME: 2.5 liters

Shipping & Returns

Our warehouse is actively shipping orders from 8am to 1pm MST Monday through Friday. Most orders ship in one business day, but the transit time can take up to 7 days, depending on your distance from Boulder, Colorado.

2nd Day and Next Day Air orders will ship same day if placed by 1pm MST, Monday-Friday (except holidays).

All orders are eligible for fast and easy returns within 60 days of purchase.

For more details, please check out our Help Center

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40°F || Spark Ultralight Sleeping Bag
Spark Ultralight Sleeping Bag
$269.00-$589.00
Description || Spark Ultralight Sleeping Bag

Description

The Spark Ultralight Mummy Sleeping Bag Series spans everything from an ultralight down-filled liner, to a mid-winter fast-and-light sleeping bag. Each model uses premium materials and no-frills design to provide cutting-edge performance.

Ultralight does not mean ultra-tight: The Spark mummy sleeping bags are snug but still have adequate wiggle room for the performance-oriented, backcountry user.

Design Details

TECHNICAL FEATURES

850+ LOFT ULTRA-DRY DOWN
Non-PFC Treatment
RESPONSIBLE DOWN STANDARD (RDS)
UL 10 DENIER NYLON

Tech specs

  • Best Use
    Ultralight Backpacking
  • Comes With
    Ultra-Sil™ compression bag and storage cell
  • Insulation
    Ultra-Dry Down 850+ Loft
  • Shape
    Mummy
  • Shell Fabric
    Ultralight 10D Nylon Shell
  • Zip Options
    Left-side #3 YKK zipper
RegularLong
40°F Regular40°F Long28°F Regular28°F Long18°F Regular18°F Long5°F Regular5°F LongLiner RegularLiner Long

Frequently Asked questions

Suitable for cooler temperatures?

Yes. The 5°F or possibly the 18°F will work in late Fall. The Spark 5°F will take you down to winter temperatures when paired with a greater than 3.5 R-Value sleeping mat like the Comfort Light Insulated.

Really suitable as a sleeping bag liner?

Yes. You could use the Spark 50°F, or even the Spark 40°F to boost the performance of a bag for cold-weather use. Adding one of these to a 20°F bag might make more sense than buying a 0°F bag for occasional winter use.

Able to be zipped to another sleeping bag?

No. Even though the 18°F or 5°F have full-length side zippers, they are not designed to be coupled to a sleeping bag with a right zipper (for instance the Flame 18°F or 5°F).