Description
The Sea to Summit Spark -9°C Double Sleeping Bag is built for couples who want maximum warmth without the bulk. With a 10D nylon shell, lining, hood, and footbox, it balances lightweight packability with water resistance and breathability.
Inside, RDS-certified 850+ fill power goose down is treated with ULTRA-DRY Down™ to resist moisture, maintaining loft and insulation on damp nights. A technical mummy fit, full hood adjustment, and draft protection throughout deliver reliable thermal efficiency for cold-weather trips.
Box wall baffle construction minimises cold spots, while vertical chest and horizontal base baffles keep down evenly distributed. A three-quarter YKK #5 zipper with dual sliders and a snag-free plow makes venting or entry easy, and down-filled draft tubes along the zip and collar help retain heat.
Rated to a comfort temperature of −2 °C with a lower limit of −9 °C, the Spark Double is a genuine sub-zero option for two. Packed into a 20L bluesign® approved compression sack, it compacts down to 14.3L for efficient carrying on ultralight missions.
- Comfort rating −2 °C, lower limit −9 °C
- RDS-certified 850+ fill power goose down with ULTRA-DRY Down™ treatment
- 10D nylon shell, lining, hood, and footbox with non-PFC DWR finish
- Mummy shape with technical hood for warmth and weight savings
- Vertical chest baffles, horizontal base baffles, and box wall construction to reduce cold spots
- Down-filled draft collar and draft tubes along zips
- YKK #5 three-quarter zipper with zip plow and dual sliders
- Compatible with Sea to Summit quilts
- Includes 20L recycled nylon compression bag (bluesign® approved)
Season: 3 Season
Shape: Double Mummy
Comfort Rating: −2 °C
Lower Limit: −9 °C
User Height (max): 198 cm
Internal Girth: 268 cm chest | 246 cm hip | 209 cm foot
External Dimensions: 211 x 134 cm
Packed Size: 46 x 18 x 27.5 cm
Weight: 1.54 kg (in use) | 1.64 kg (packed)
Fill Weight: 985 g
Compressed Volume: 14.3 L
Materials: 10D nylon shell and lining with non-PFC DWR
Insulation: RDS-certified 850+ goose down with ULTRA-DRY Down™ treatment
Zipper: YKK #5, three-quarter length, dual sliders, zip plow
Draft Protection: Collar and zipper draft tubes
Contact us within 30 days of receiving your goods to request a refund or exchange if products are eligible (see: Return Policy).
All packaging or products must be in their original, re-sellable condition.
Outlet sales are final and can only be returned for exchange. Items found faulty or under warranty will be replaced or refunded.
Some special condition products are labelled as No Refund & Exchange Products. Sale of these items are final and are not eligible for neither refunds nor exchanges.
For safety reasons, K2 cannot accept returns on climbing equipment, socks, underwear and some other products unless faulty.
Please check out our refund policy if you need more information.