Sea To Summit - Spark SpII Sleeping Bag Regular - Ultra-Dry Down, 2 C rated

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Sea to Summit's Spark is an ultra light sleeping bag. It's balance of size, weight and warmth make it ideally suited for cycle touring and ultra-light hiking.

Sea To Summit - Spark SpII Sleeping Bag Regular

ULTRA-DRY Down™ protection and warmth in a minimalist package

“When you need a sleeping but don’t want to be weighed down by one, what’s to be done? Until now you either slowed yourself down with something inadequate or took the spartan option and suffered without. Now the Spark has changed the game completely. Neither comfort nor performance need be sacrificed!” Tim Macartney-Snape

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 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 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 microweight shell and liner fabrics, the 1/3 length light-gauge #3 YKK zip and the sewn-through transverse baffle construction.

The Spark compresses so small, Sea to Summit had to re-engineer their 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.

1/3 Zip Mummy

The Spark is cut as a close-fiitting mummy bag. The full hood, foot box and short zip maximise fit and warnth while keeping weight and bulk to a minimum.

Suggested use: Travel; Adventure racing; Summer cycle touring; Liner bag; Ultra lightweight hiking; Ultra lightweight alpine climbing

  • Contoured mummy
  • 10D Pertex® Quantum shell for minimal weight and bulk
  • Sewn through lateral baffles over legs
  • Box wall baffles over torso
  • 55/45 fill ratio
  • Differential fill to gradually concertrate warmth over body core
  • Contoured hood with drawcord
  • Tapered footbox
  • 1/3 length YKK #3 side zip
  • Includes lightweight 15D Ultra-Sil® compression bag
  • Mesh storage cell and laundry bag

Video from Sea to Summit about their Ultra-Dry Down

Contoured Mummy Shape

Sea to Summit's contour mummy shape has been sized generously across the shoulders and chest to allow space for wearing extra layers in extreme conditions. There is knee room to allow turning and the boxfoot is oversized to give room for boot liners.
Ultra-Dry Down
Ultra-Dry Down has a water repellent treatment protecting the down from moisture and condensation. The water repellent polymer treatment vastly improves the downs water repellency without effecting it's weight or loft performance. Ultra-Dry Down retains over 60% more loft and absorbs 30% less moisture when compared with untreated down. This not only helps insulate better in wet conditions but means Ultra-Dry Down bags dry much quicker too. The treatment also stops bacterial and microbial growth, making the bags more hygenic and giving them a longer life span.

About Sea to Summit:

Sea to Summit is a manufacturer of Outdoor, travel and watersports equipment. Started in Perth, Western Australia they have steadily grown and now their products are sold in thirty five countries around the world. They produce innovative, durable, lightweight and compact gear for travellers and outdoor enthusiasts. Through ongoing research and development they strive to be at the cutting edge of product and manufacturing innovation, producing better made and better performing products for their ever growing customer base around the world.

Sea to Summits Philosophy: 
“To equip and inspire. Our goal is to create such cool and useful gear that it motivates and inspires people to travel and lead an active, outdoor lifestyle. Every piece of gear is made to make you want to take it outside or travel with it, to make your trip lighter, to be more organised, more comfortable, more carefree so that no matter what the conditions, you can revel in being out there experiencing our wonderful planet.”


Fill: Ultra-Dry Down, 850+ Loft, 90% Down cluster, premium European Goose Down
Fill Weight: 280g
Bag weight: 464g
Zip options Left hand zip, 1/3 length
Temp rating: 7°C to 2°C
Season rating: Summer/Spring/Autumn
Compression Bag: XXS: 3.3L to 1.3L
Brand Sea To Summit
Shipping Weight 0.5000kg

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