Source-linked specifications for the Sea to Summit Spark Down Sleeping Bag — 15F / Double. This is a detailed sleeping bags record, checked on 2026-10-30; price and live stock are not verified.
As an Amazon Associate I earn from qualifying purchases.
What the specs mean
The product name or temperature label is not automatically an ISO comfort rating. The recorded comfort figure is 28°F (-2.2°C); verify the exact size and test method before planning a cold night. Fit also depends on usable internal length, shoulder room and your sleeping position. Pad insulation and weather matter as much as the bag.
Read the exact variant
15F / Double is the recorded option. Other sizes or revisions may have different dimensions, weight, or test labels.
Reported specifications
Unit conversions are calculated from the source value. Open the source tag for the originally published number.
| Specification | Manufacturer or retailer value |
|---|---|
| Product temperature label | 15°F [BQ-STS-SPARK] |
| ISO comfort temperature | 28°F [BQ-STS-SPARK] |
| ISO lower-limit temperature | 16°F [BQ-STS-SPARK] |
| Temperature test standard | ISO 23537 (edition unspecified) [BQ-STS-SPARK] |
| Rating method | ISO lower limit [BQ-STS-SPARK] |
| Fill | goose down 90/10 [BQ-STS-SPARK] |
| Fill power | 850 [BQ-STS-SPARK] |
| Fill weight | 34.7 oz [BQ-STS-SPARK] |
| Shape | mummy [BQ-STS-SPARK] |
| Weight | 3.40 lb [BQ-STS-SPARK] |
| Packed volume l | 14.3 L [BQ-STS-SPARK] |
| Max user height cm | 78.0 in [BQ-STS-SPARK] |
| Fill power qualifier | + [BQ-STS-SPARK] |
| Shell fabric | 10D nylon [BQ-STS-SPARK] |
| Lining fabric | 10D nylon [BQ-STS-SPARK] |
| Water repellent treatment | non-PFAS DWR / Ultra-Dry Down [BQ-STS-SPARK] |
A blank or unverified value means the dataset cannot support a number; it does not mean zero. Each source tag opens the record used for that field.
Check a current Amazon search
Search for Sea to Summit Spark Down Sleeping Bag and check the exact size, revision and seller details before ordering.
(paid link)Search this model on AmazonAmazon search results may include different variants or sellers. No price or stock is verified here.Sizes and alternatives
Compare a size against its own record. Shared family names do not prove identical weight or dimensions.
Other models to inspect
Verification limits
Evidence basis: manufacturer_declared. US market: confirmed. Listing status: listed. These labels do not establish current stock.
Unverified fields: See blank fields in the source data.
- Weight is bag weight from variant table, not selected-page Packed Weight.
- Coupling is only confirmed for variants equipped with full-length zippers.
Where these facts came from
- Spark Down Sleeping Bag — Sea to Summit, accessed 2026-10-30 [BQ-STS-SPARK]
We link to a seller or manufacturer for verification and do not handle purchases, delivery, or returns. Check current terms and the exact SKU with that seller.
Questions to ask before buying
Is the listed price current?
No price or live stock data is included. Use the official product link for the current listing.
Does a nominal capacity or temperature label guarantee fit or warmth?
No. Compare exact dimensions and tested values where available, then allow for real-world conditions.
See an error? Send a correction