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Sea to Summit Spark SPIII Down Sleeping Bag


5.0 (2 reviews)

The new ultralight Spark Series of sleeping bags are what you reach for when you need a high performance sleeping bag but don’t want to be weighed down by one. The expedition-sized Spark SPIII combines ULTRA-DRY Down™ 850+ loft premium goose down, light-gauge #3 YKK® zip, high-performance 10D nylon shell and 7D lining fabrics and a contoured mummy shape for efficient insulation and superior performance. Other features include a full box baffle construction to allow for extra down and reduce cold spots, a full-length zip and a draft tube, full hood and neck collar to keep heat in. A cold-weather adventure bag.

    • Comfortable: -2C
    • Limit: -8C
    • Extreme: -26C

    Weight (regular): 665 grams


  • Ultralight 7D and 10D fabrics for minimal weight and packed size
  • RDS 850+ Loft Premium Goose ULTRA-DRY Down for maximum insulation value
  • Contoured mummy shape for comfort and efficient insulation
  • Vertical chest baffles prevent down migration and cold spots
  • Uses a full box baffle construction to accommodate extra down and reduce cold spots
  • Expedition mummy bag sizing provides extra space for layered clothing or extra wriggle room
  • Vertical baffles on chest optimises positions of down to prevent it moving during use
  • Full side zip with two sliders provides easy access and extra ventilation options
  • Zipper draft tube, hood and front neck draft collar to prevent warmth being lost when it’s needed
  • Includes lightweight Ultra-Sil Nano compression bag for compact storage
  • Left Zip
Fits to 183cm (Regular), 198cm (Long)
Shoulder Width 77cm (Regular), 81cm (Long)
Foot Width 47cm (Regular), 50cm (Long)
Rolled Size ⌀15 x 35cm
Compression 4.6 litres (Regular), 5.4 litres (Long), 6 to 2 litres sack volume
Fill ULTRA-DRY Down™ 850+ Loft premium Goose Down (min. 90% down)
Fill Weight 430g (Regular), 485g (Long)
Average Weight 665g (Regular), 745g (Long)
Outer Material 10D nylon
Inner Material 7D nylon
Temperature Rating EN13537 Temp Rating Comfort: -2C
EN13537 Temp Rating Lower Limit: -8C
EN13537 Temp Rating Extreme: -26C

Additional information


Regular, Long

2 reviews for Sea to Summit Spark SPIII Down Sleeping Bag

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  1. Anonymous (verified owner)

  2. Mike Washer (verified owner)


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