Sea To Summit

Sea to Summit - Spark SpIV Down Sleeping Bag

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  • Regular price $735.95

The Sea To Summit Spark IV sleeping bag is ultralighttechnical, and designed to keep you as warm as possible with minimal packed weight and size. The Spark series can span everything from an ultralight liner to a hard-alpine or adventure racing bag, to an expedition-weight midwinter bag.

The Spark IV's temperature rating per EN13537 standards is:

  • Comfort: -8°C | 18°F
  • Lower Limit: -15°C | 5°F
  • Extreme: -36°C | -33°F

The Spark IV features:

  • Expedition mummy design for extra space when wearing layered clothing
  • RDS 850+ Loft ULTRA-DRY Down for superior insulating power, moisture resistance and compressibility
  • 10D Nylon shell and 7D lining fabrics
  • Vertical chest baffles prevent down migration and cold spots
  • Full zip with two sliders to aid access and provide ventilation options
  • Zipper, hood and collar draft tube prevents heat loss
  • Includes storage cell and lightweight Ultra-Sil compression bag for compact storage.


Weight : 880g (fill weight 620g)

Dimensions : 155 x 135 x 94cm

Max. User Height : < 183cm

Compression Sack Size : S

Length : Regular

Zipper Position : Left

Lower Temperature Limit (degrees Celsius) : -15 and below

Shape : Mummy

Insulation Type : Down