Using the warmth of 850+ loft 90/10 goose down, the amazing moisture protection of ULTRA-DRY Down™, and a micro-weight 10D Pertex® shell and 15D lining, Sea to Summit have created one of the best warmth for weight minimalist sleeping bags available.
The Spark is an ultralight 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 ultralight walkers. Its size and warmth rating works well as a liner bag, slipping inside another sleeping bag to add one or two seasons to its rating.
The secrets of the Spark’s warmth to weight are in the premium quality down and high performance micro-weight shell and liner fabrics, the 1/3 length light-gauge #3 YKK zip and the sewn-through transverse baffle construction.
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.
The Spark is cut as a close-fitting mummy bag. The full hood, foot box and short zip maximise fit and warmth while keeping weight and bulk to a minimum.
10D Pertex Quantum shell
Ultra-Dry Down™ 850+ Loft
90/10 European Goose Down
Contoured mummy shape, sewn through lateral baffles over legs, box wall baffles over torso, 55/45 fill ratio, differential fill to gradually concentrate warmth over body core, contoured hood with drawcord, tapered footbox, 1/3 length YKK #3 zip. Includes lightweight 15D Ultra-Sil compression bag, mesh storage cell and laundry bag.
Fill weight: Regular 280g | Long 305g
Bag weight: Regular 464g | Long 510g
Length options: Regular 183cm | Long 195cm
Dimensions: Regular Chest 146cm, Hip 126cm, Foot 88cm | Long Chest 152cm, Hip 132cm, Foot 94cm
Season ratings: Summer, Autumn, Spring
Suggested use: Travel, Adventure racing, Cycle touring, Liner bag, Ultra lightweight hiking, Ultra lightweight alpine climbing.
Compressed volume: 2.9 litres
Compression bag: 2X Small - 3.3 to 1.3 litres
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