The Spark 15F is the cold-rated bag in Sea to Summit's regular Spark line. 850+ fill-power down with a non-PFAS water-repellent treatment; 10-denier nylon ripstop shell. Comfort rating 21°F, limit 15°F. Regular fits to 6 ft 1 in; Long fits to 6 ft 6 in. Ships with a compression sack. Sized for spring and fall overland trips at elevation.
Sea to Summit
Spark 15F Down Sleeping Bag
Shipping
$549
1 retailer
At a glance6 specs
shell
10D nylon ripstop
fill power
850
fits height
Up to 6 ft 1 in (Regular) / 6 ft 6 in (Long)
fill treatment
Non-PFAS Ultra-Dry Down
comfort rating f
21
temperature rating f
15
Where to buy
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Description
Last reviewed May 15, 2026
Full specifications
6 fields
| shell | 10D nylon ripstop |
|---|---|
| fill power | 850 |
| fits height | Up to 6 ft 1 in (Regular) / 6 ft 6 in (Long) |
| fill treatment | Non-PFAS Ultra-Dry Down |
| comfort rating f | 21 |
| temperature rating f | 15 |
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