Sea To Summit Spark SpIV

Our Spark™ Series bags is what you reach for when you need a high performance sleeping bag but don’t want to be weighed down by one.

The Spark™ Series 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.


  • Contoured mummy shape for efficient insulation
  • Updated sizing provides extra room for both shoulders and hips while still maintaining insulation efficiency
  • Includes lightweight Ultra-Sil™ Nano compression bag for compact storage
  • Vertical box baffles in the torso area accommodates extra down and boosts warmth around the core, vertical baffles on chest optimises positions of down to prevent it moving during use
  • Lower part of the bag uses a sewn through horizontal baffle construction to minimise weight
  • ½ zip with two sliders aids access and allows ventilation from mid-section of bag
  • Draft tube prevents heat loss through the zipper
  • Includes hood draft collar

Technical features

  • Outer material: 7D nylon
  • Lining: 7D nylon
  • Insulation: RDS 850+ Loft Premium Goose ULTRA-DRY Down™
  • Weight: 985 g
  • Temperature rating: -8 °C/ -15 °C/ -36 °C
  • Body length: 198 cm
  • Packed size: 18 x 40 cm
599,95 €
Jaama 12
color: dark grey/yellow available