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Spark II - Ultralight - 2C

Original price $658.95 - Original price $694.95
Original price
$658.95 - $694.95
Current price $694.95
Size: Long

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.

850+ Fill Power indicates that 1 oz of down will re-expand to over 850 cubic inches after compression. Higher loft means that less down can be used to achieve the same temperature rating – important for performance sleeping bags. The loft and down quality/composition are independently tested by the International Down and Feather Laboratory (IDFL) – a copy of the certification is supplied with every Sea to Summit sleeping bag.


ULTRA-DRY Down is a permanent nano-level water repellent polymer treatment applied to our down which protects it from external moisture and condensation from inside the bag virtually eliminating the negative effects moisture has on down

Ultra-light and technical, our Spark Series bags are designed to keep you as warm as possible while minimising packed weight and size.

  • 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



Recommended User Height
Packed dimensions ø13 x 19 CM ø13 x 26 CM
Compressed Volume (ASTM F1853-11) 2.5 L 3.5 L
Weight 490 G 560 G
Fill Weight 300 G 345 G
Internal Chest Circumference 150 CM 158 CM
Internal Hip Circumference 130 CM 138 CM
Internal Foot Circumference 88 CM 94 CM