Sea to Summit Spark -1C/30F Down Sleeping Bag

The Sea to Summit Spark Ultralight Sleeping Bag provides great ultralight performance without sacrificing comfort. Whether you're embarking on a summer trek or a winter expedition, these mummy sleeping bags offer superb warmth and versatility. Made with premium materials and a no-frills design, they are the go-to choice for adventurers seeking to travel light as well as a cosy snooze. 

Details:
- 850+ FILL Power, RDS-certified, Goose Down with Ultra Dry Down treatment for improved water resistance in damp conditions
- 10-Denier Nylon shell and lining. 10-Denier Nylon waterproof-breathable hood and footbox.
- Mummy Fit: Fitted cut with generous footbox and technical hood, to maximise thermal efficiency and minimise bulk and weight.
- Spark 7C/45F & 1C/30F Primary zip - 1/2 length #5 with zip-plow and two sliders. Spark -9C/15F & -18C/0F Primary zip - 3/4 length #5 with zip-plow and two sliders.
- Vertical chest baffles, horizontal baffles lower half and base. SPARK 7C sewn through quilted construction throughout. SPARK -1C/30Fbox wall baffles top half of bag and sewn through quilted construction lower half. SPARK -9C & -18C box wall baffle construction throughout.
- Spark 7C, -1C & -9C Standard front draft collar. SPARK -18C Double draft collars
- Spark 7 & -1 can't be paired. Spark -9 & -18: Pairs with Women's Sea to Summit bags.
- QuiltLock System integrates with StS quilts

Tech Specs:
Best Use
- Ultralight Backpacking
Comes With
- Ultra-Sil compression bag and storage cell
Insulation
- Ultra-Dry Goose Down 850+ Loft
Material(s)
- 10-Denier Nylon shell and lining. 10-Denier Nylon waterproof-breathable hood and footbox.
Shape
- Mummy Fit: Fitted cut with generous footbox and technical hood
Zip Options
- Left-side #3 YKK zipper
Bag Weight
- Regular: 493g
- Long: 536g
Compression Sack 
- Regular: 8L
- Long: 8L
Fill Weight:
- Regular: 265g 
- Long: 305g 
Fits Up to Height
- Regular: 185cm
- Long: 198cm
Temperature Rating (En Lower Limit)
- -1ºC