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Spark Ultralight Sleeping Bag (5°C, -2°C, -8°C & -15°C)

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Spark Ultralight Sleeping Bag (5°C, -2°C, -8°C & -15°C)

award winner
Engineered to keep you warm at the lightest weight and smallest compressed size+ View tech specs
  • Temp Rating
  • Size
You can add a maximum of 5 units of this product to your cart.

BEST USE: Ultralight Backpacking

PERFORMANCE: Summer or Sleeping Bag Liner

WEIGHT: 7.9oz | 225g


Shipping & Returns

We use climate-neutral shipping with DHL GoGreen.

For orders within Germany we charge a shipping fee of 6,95 €.
For international orders, shipping costs 9,95 €.

All orders are usually shipped within 24 hours on working days. Delivery time can take up to three working days Germany-wide and up to six working days internationally, and depends on the shipping service provider.

All orders can be returned within 14 days of purchase. However, for the sake of the environment, please make sure to keep returns as low as possible.

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Spark I (5°C) || Spark Ultralight Sleeping Bag
Spark Ultralight Sleeping Bag (5°C, -2°C, -8°C & -15°C)
Description || Spark Ultralight Sleeping Bag


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.

Tech specs

  • Best Use
    Ultralight Backpacking
  • Comes With
    Ultra-Sil compression bag and storage cell
  • Insulation
    Ultra-Dry Down 850+ Loft
  • Shape
  • Shell Fabric
    Ultralight 10D Nylon Shell
  • Zip Options
    Left-side #3 YKK zipper
5°C Regular5°C Long-2°C Regular-2°C Long-8°C Regular-8°C Long-15°C Regular-15°C LongLiner RegularLiner Long


Non-PFC Treatment

Design Details

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).

You have more questions?

Check out our FAQ page HERE and discover even more answers about our products.

Customer Reviews

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