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Sea to Summit

Sea to Summit Spark SpIII Sleeping Bag Regular Left grey

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  • Free delivery from £992
  • 100 day return policy
Product Description

The sub-zero Spark. Perfect for winter missions where you were previously agonising about not taking a bag at all. Using the warmth of 850+ loft 90/10 Premium goose down, the amazing moisture protection of Ultra-Dry Down, and a micro-weight 10D Nylon shell and 15D lining, Sea to Summit have created one of the best warmth for weight minimalist sleeping bags available. The Spark is an ultra light bag with many possible uses. Its balance of size, weight and warmth make it an excellent summer sleeping bag, especially for weight and space conscious cycle tourers and ultra light walkers. It also works well as a liner bag, slipping inside another sleeping bag to add one or two seasons to its rating. The Spark compresses so small, Sea to Summit had to re-engineer the compression-sacks to make one that reduced sufficiently. The Ultra-Dry Down protection makes the Spark an impressive hard-alpine or adventure racing sleeping bag, where down has never before been a viable option, and weight is simply not tolerated.


  • Down: Ultra-dry down 850 + loft, European goose down
  • Adapted mummy cut
  • 10D Pertex quantum case for minimum weight and volume
  • Stitched, circular rooms on the legs
  • continuous quilted rooms in the form of box construction for optimal full-body heat
  • Pull cord for optimal full-body heat
  • 55/45 fill balance
  • Uneven filling to concentrate heat to the centre of the body
  • Custom hood with drawstring cord
  • Cone-shaped foot box
  • 1/3 length YKK #3 side zipper
  • Includes light 15D Ultra-sil compression bag, mesh Storage cell and laundry bag
  • for travel, adventure racing, winter bike, liner bag, ultralight hiking and alpine climbing
  • Compression-capacity: 3.7 L
  • Zipper left side
  • Size (chest, hips, feet): 146, 126, 88 cm
season: Winter & extreme weather sleeping bag  
Sleeping Bag
Category: Down sleeping bag
Form: Mummy form
Temperature Range
Comfort temperature: 2 °C
Max temperature: -4 °C
Extreme temperature: -20 °C
Upper material: Nylon
Cover material detail: 100% nylon
Inner Fabric: Nylon
Lining detail: 100% nylon
Filling: Goose down
Sleeping bag: 625 g
Filling: 400 g
Body size: 183  cm
Pack Bag
with compression straps: yes  
contains non-textile parts of animal origin
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