NEMO Equipment
Disco Men's Endless Promise Down Sleeping Bag 15F
$299.95Cheaper
Released 2024
Best Sleeping Bags · head-to-head
Disco Men's Endless Promise Down Sleeping Bag 15F vs Spark SpII Ultralight Down Sleeping Bag
A sourced, side-by-side comparison. Disco Men's Endless Promise Down Sleeping Bag 15F is cheaper at $299.95. Every spec and price links to its source.
Sea to Summit
Spark SpII Ultralight Down Sleeping Bag
$409
Which is better: the Disco Men's Endless Promise Down Sleeping Bag 15F or Spark SpII Ultralight Down Sleeping Bag?
The Spark SpII Ultralight Down Sleeping Bag wins 1 of the 1 specs we compare head to head; the other wins 0. The Disco Men's Endless Promise Down Sleeping Bag 15F is the cheaper at $299.95. Get the Spark SpII Ultralight Down Sleeping Bag for the stronger spec sheet, the Disco Men's Endless Promise Down Sleeping Bag 15F to spend less.
See Disco Men's Endless Promise Down Sleeping Bag 15F on Amazon See Spark SpII Ultralight Down Sleeping Bag on Amazon
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Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | Disco Men's Endless Promise Down Sleeping Bag 15F | Spark SpII Ultralight Down Sleeping Bag |
|---|---|---|
| US price | $299.95 | $409 |
| Brand | NEMO Equipment | Sea to Summit |
| Released | 2024 | — |
| Temperature rating f | 15 | 28 |
| Insulation type | down | down |
| Fill power | 650 | 850 |
| Shape | spoon | mummy |
| Packed weight (lb) | 2.69 | 1.17 |
| Packed size | 11.5 x 8.5 in | 2.5 L (approx. 1-liter bottle size) |
| Zipper side | left | — |
| Product note | Classic Spoon shape (mummy variant with extra shoulder/hip width); 650 FP PFAS-free hydrophobic RDS-certified down; Thermo Gill vents | Lower limit 28F / -2C; comfort 38F / 4C; Ultra-Dry Down PFAS-free treatment; regular size; 530 g / 18.7 oz |
Sources — Disco Men's Endless Promise Down Sleeping Bag 15F: nemoequipment.com (verified 2026-06-20). Spark SpII Ultralight Down Sleeping Bag: advnture.com (verified 2026-06-20).
What's the difference between the Disco Men's Endless Promise Down Sleeping Bag 15F and Spark SpII Ultralight Down Sleeping Bag?
Where the two actually differ on the specs we track (6 of 8). Matching specs are omitted.
- Temperature rating f: Disco Men's Endless Promise Down Sleeping Bag 15F 15 vs Spark SpII Ultralight Down Sleeping Bag 28
- Fill power: Disco Men's Endless Promise Down Sleeping Bag 15F 650 vs Spark SpII Ultralight Down Sleeping Bag 850
- Shape: Disco Men's Endless Promise Down Sleeping Bag 15F spoon vs Spark SpII Ultralight Down Sleeping Bag mummy
- Packed weight (lb): Disco Men's Endless Promise Down Sleeping Bag 15F 2.69 vs Spark SpII Ultralight Down Sleeping Bag 1.17
- Packed size: Disco Men's Endless Promise Down Sleeping Bag 15F 11.5 x 8.5 in vs Spark SpII Ultralight Down Sleeping Bag 2.5 L (approx. 1-liter bottle size)
- Product note: Disco Men's Endless Promise Down Sleeping Bag 15F Classic Spoon shape (mummy variant with extra shoulder/hip width); 650 FP PFAS-free hydrophobic RDS-certified down; Thermo Gill vents vs Spark SpII Ultralight Down Sleeping Bag Lower limit 28F / -2C; comfort 38F / 4C; Ultra-Dry Down PFAS-free treatment; regular size; 530 g / 18.7 oz