Using the warmth of 850+ loft 90/10 goose down, the amazing moisture protection of Ultra-Dry Down, and a micro-weight 10D shell and 15D lining, we have created one of the best warmth for weight minimalist sleeping bags available.
The Spark is an ultra light bag with several key uses. Its balance of size, weight and warmth make it excellent as a summer sleeping bag, especially for weight and space conscious cycle tourers, and ultra light walkers. Its size and warmth rating works well as a booster bag, slipping inside another sleeping bag to add one or two seasons to its rating. The Ultra-Dry Down protection makes it an impressive hard-alpine or adventure racing sleeping bag, where down has never before been a viable option, and weight is simply not tolerated.
The Spark compresses so small, Sea to Summit had to re-engineer their compression-sacks to make one that reduced sufficiently.
The secrets of the Spark’s warmth to weight are in the premium quality down and micro weight shell and liner fabrics, the 1/3 length light-gauge #3 YKK zip and the sew-through transverse baffle construction.
The Spark is cut as a close-fiitting mummy bag. The full hood, foot box and short zip maximise fit and warmth while keeping weight and bulk to a minimum.
Amazing warmth for weight
55/45 top/bottom differential fill ratio to gradually concentrate warmth over body core
Contoured mummy shape
Sewn through construction to keep weight down
Transverse baffles for maximum loft
Ultra-Dry Down protection for use in any conditions
10D Pertex Quantum shell fabric treated with DWR for minimal weight and bulk;
15D nylon soft touch, high density weave lining
1/3 length #3 YKK zip minimises weight and bulk
Tapered shaped box foot construction to minimise cold spots
includes lightweight Ultra-Sil compression bag and a combined storage cell / laundry bag
Sewn through lateral baffles over legs, Box wall baffles over torso
3D Differential cut drawcord contoured hood
Short: for people up to 170 cm / 5\’7
Regular: for people up to 185 cm / 6′
Long: for people up to 202 cm / 6’6
Down: ULTRA-DRY Down™ 850+ Loft 90/10 European Goose Down
Fill weight: Regular 280g 9.9oz Long 305g 10.8oz
Bag weight: Regular 464g 16.4oz Long 510g 18oz
Length / zip options: Regular – left 1/3 length zip Long – left 1/3 length zip
Suggested use: Travel; Adventure racing; cycle touring; Liner bag; Ultra lightweight hiking; Ultra lightweight alpine climbing
Compressed volume*: 2.9 litres
Compression bag: 2XS – 3.3L to 1.3L