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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
Zipper draft tube
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.
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