If you're counting grams, and want a great night's sleep, the ultralight Spark is the right bag for you. Filled with RDS-certified 850+ fillpower goose down treated with a non-PFC Ultra-Dry Down treatment, the Spark is constructed with a technical hood and zipper draft tube to retain warmth. Comfort comes from a super-breathable 10 denier liner fabric, while a 10D shell with a non-PFC DWR plus a highly water repellent hood and footbox fabric shed wind and condensation. The full-length zipper model can be zipped to an equivalent Women's Spark for comfort that couples can share.
Available in 7°C comfort rating and -1°C comfort rating.models.
- The 7°C bag has an ultralight weight of 363g for the regular size and 387g for the long.
- The -1°C bag weighs 493g for the regular and 536g for the long.
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Features
- Mummy Fit with generous anatomical footbox and technical hood, to maximise thermal efficiency and minimise bulk and weight
- 10D nylon shell and lining fabric offers breathability, protection and effective temperature regulation for premium comfort in the outdoors; PFC-free DWR (durable water repellent) treatment keeps the hood and footbox highly water resistant
- 850+ Fill Power, RDS-certified, Goose Down with ULTRA-DRY Down treatment for improved water resistance in damp conditions
- 3/4-length #5 zip with anti-snag zip plow and two sliders
- Vertical chest baffles, horizontal baffles in the lower half and base, box wall baffles in the top half and sewn-through quilted construction lower half
- Technical fitted hood with soft touch adjustment, extra deep for cosy-like feel
- Standard front draft collar
- Single, down-filled draft tube along the top of zips
- QuiltLock System allows integration with Sea to Summit quilts
- Comes with an Ultra-Sil compression bag and a handy looser storage cell bag
- Ultralight doesn't
- mean ultra-tight: The Spark mummy sleeping bags are snug but still have enough wiggle room for the performance-oriented, backcountry user
Specifications
- Fits to 185cm (Regular), 198cm (Long)
- Shoulder Width 77.5cm (Regular), 82.5cm (Long)
- Foot Width 51cm (Regular), 56cm (Long)
- Fill ULTRA-DRY Goose Down 850+ Loft, RDS certified
- Outer Material 10D nylon
- Inner Material 10D nylon with a non-PFC DWR finish
7°C Spark Sleeping Bag
- Fill Weight 150g (Regular), 170g (Long)
- Average Weight 363g (Regular), 387g (Long)
- Compression 2 Litres (Regular), 3 Litres (Long)
- Temperature Rating 11°C comfort rating woman / 7°C Lower comfort rating for men; Temperature rated in accordance with ISO 23537-1:2022
-1°C Spark Sleeping Bag
- Fill Weight 265g (Regular), 305g (Long)
- Average Weight 493g (Regular), 536g (Long)
- Compression 8 Litres
- Temperature Rating 4°C comfort rating woman / minus 1°C Lower comfort rating for men; Temperature rated in accordance with ISO 23537-1:2022
Technologies
- ULTRA-DRY Down™: With the introduction of water-repellent ULTRA-DRY Down™ Seat to Summit have virtually eliminated the negative effects moisture has on down. The ULTRA-DRY Down™ water-repellent treatment protects the down from external moisture and condensation from inside the bag. It is a permanent (no loss of treatment effect has been seen in over 14 wash cycles) Nano-level water repellent polymer treatment applied to Sea to Summit high loft, high quality down. The Nano-thin treatment vastly improves the down's reaction to water without effecting its weight or loft performance. ULTRA-DRY Down™ retains over 60% more loft and absorbs 30% less moisture when compared with untreated down. Sea to Summit sleeping bags dry out 60% faster than bags with untreated down. The Nano-level treatment also inhibits bacterial and microbial growth, which makes Sea to Summit sleeping bags more hygienic and improves their lifespan.
- Responsible Down Standard (RDS): The RDS is helping to shift the entire down and feather industry towards more humane animal rearing and handling practices. Overseen by the industry leading Textile Exchange, the RDS requires independent, third party assessments of all aspects of animal rearing and handling throughout the entire supply chain. By only using down that meets the audited requirements of the RDS we can have confidence that each phase of the collection process has been completed with the welfare and ethical treatment of waterfowl in mind. To find out more about how the RDS is improving animal welfare during down collection, please visit (link will open a new window).
