Elevate your outdoor adventures with the Sea to Summit Spark Ultralight Sleeping Bag, a series that encompasses a wide range of options, from an ultralight down-filled liner to a mid-winter fast-and-light sleeping bag. With a focus on premium materials and minimalist design, these sleeping bags are engineered for cutting-edge performance in the backcountry.

While the Spark sleeping bags are ultralight, they do not compromise on comfort. They provide a snug fit while still offering enough wiggle room for performance-oriented backcountry users. The combination of innovative design and top-quality materials makes these bags an ideal choice for those who demand both efficiency and warmth.

Key Features:

  • High-Grade Insulation: The Spark series features ULTRA-DRY Down with 850+ Loft, consisting of 90% down cluster premium goose down that's certified by the Responsible Down Standard (RDS). This ensures exceptional warmth and insulation.
  • Featherlight Shell and Liner: The 10D shell and 7D liner materials contribute to the incredible lightweight and compact packed size of these sleeping bags.
  • Complete Package: Each sleeping bag comes with a lightweight Ultra-Sil compression bag and a convenient storage cell for easy packing and organization.
  • Zipper Length Options: Depending on the model, Spark bags are available with different zipper configurations. Choose from 1/3-length zippers for warmer conditions or full-length side zippers for colder nights.
  • Baffle Construction: The baffling design varies between models. Some have sewn-through construction, while others offer fully baffled chambers for maximum warmth and insulation.
  • Mummy Shape: The Spark series includes contoured mummy-shaped bags for models rated at 10°C, 5°C, and -2°C. For colder conditions, -8°C and -15°C models feature a broader mummy shape.


  • Size: Long
  • BAG SERIES: Spark 2
  • BAG WEIGHT: 560g
  • COMPRESSION SACK: XXS - 3.3L to 1.3L
  • FILL WEIGHT: 345g
  • FITS UP TO HEIGHT: 198cm
  • SEASON RATING: 2 Seasons

The Sea to Summit Spark Ultralight Sleeping Bag represents the pinnacle of lightweight, high-performance sleeping gear. Whether you're a summer backpacker or a dedicated backcountry explorer, these sleeping bags offer the ideal balance between comfort and weight. With premium down insulation and innovative design, the Spark series ensures you stay warm and cozy even in the most demanding outdoor conditions.


Model # ASP2-L
Barcode # 9327868094998
Brand Sea to Summit

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