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Sea To Summit Spark SP1 Sleeping Bag

Weighs 348g
Code: ASP1-R
  • From $273.84
  • RRP: $289.06
Item in Stock   |   Usually dispatched within 24 hours
  • Ultra-light and technical, our Spark™ Series bags are designed to keep you as warm as possible while minimising packed weight and size.
  • 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
  • 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 zip 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, and that mummy design is then tweaked for each model to best fit the use scenario.
  • Our 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.
  • 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
  • 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
  • Includes lightweight Ultra-Sil™ Nano compression bag for compact storage
  •  WEIGHT: 340G Regular  385G Long
  • Shell: 100% Nylon, Lining: 100% Nylon, Primary Filling Material: GOOSE DOWN (Min. 90% Down), Stuffsack: 100% Nylon excluding Trims 



Regular       Long

Recommended User Height up to 183 CM up to 198 CM
Packed dimensions ø11 x 23 CM ø11 x 23 CM
Volume Compressed 1.5 L 2.2 L
Compression sack volume (compressed) 2.5 to 1 L 2.5 to 1 L
Weight 340 G 385 G
Fill Weight 180 G 205 G
Internal Chest Circumference 150 CM 158 CM
Internal Hip Circumference 130 CM 138 CM
Internal Foot Circumference 88 CM 94 CM

An excellent down sleeping bag ideal for MdS and a myRaceKit recommendation!

Comfort 9C 48F

Lower limit 5C 40F

Extreme -9C 15F

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