Sea to Summit Spark SpIII Sleeping Bag Regular

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Tuesday 3ʳᵈ Oct - Wednesday 4ᵗʰ Oct

All about this product



Ultra-light and technical, the Spark sleeping bags is designed to keep you as warm as possible while minimising packed weight and size. The Spark spans everything from an ultralight liner to an expedition weight mid-winter bag. While the end usage is very different, they reflect a design ethos of matching weather conditions to the lightest bag possible.

The secret to the impressive performance is a combination of premium materials and careful design. The RDS 850+ Loft premium goose down, light-gauge #3 YKK zippers and high performance 10D Nylon shell and 7D lining fabrics, set the stage for superior performance. These materials are combined with a contoured mummy design for efficient insulation.

The ULTRA-DRY Down water-repellent treatment protects the down from external moisture and condensation from the inside of the bag, virtually eliminating the negative effects moisture has on down. All Sea to Summit Down Sleeping Bags use Responsible Down Standard (RDS) certified down. The ULTRADRY Down protection also makes the Spark an impressive hard-alpine or adventure racing bag, where every gram is counted and down has never been a viable option.

Technical details

  • Fabrics:
    • 10D Nylon shell
    • Fill Power: 430g Ultra-Dry Down 850+ Loft
  • Insulation: RDS 90/10 Premium Goose Down
  • Temperature Rating: EN -2°c Comfort to -8°c Lower
  • Expedition mummy bag sizing provides extra space
  • Not designed to pair w/ another bag
  • Hood & front neck draft collar
  • Full side zip w/ two sliders
  • Full box baffle construction
  • Sewn through construction
  • Contoured mummy shape
  • Vertical baffles on chest
  • Wicking moisture
  • Zipper draft tube
  • Breathable
  • Unisex
  • Weight: 665g


Insulation Type

Technical Features

Season rating
3 Season

Other features

Sea to Summit
Product Code
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