NEMO Equipment
NEMO Equipment Disco Men's Endless Promise Down Sleeping Bag 15F
$299.95Cheaper
Released 2024
Best Sleeping Bags · head-to-head
NEMO Equipment Disco Men's Endless Promise Down Sleeping Bag 15F vs Sea to Summit Spark SpII Ultralight Down Sleeping Bag
A sourced, side-by-side comparison. NEMO Equipment 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
Sea to Summit Spark SpII Ultralight Down Sleeping Bag
$409
Which is better: the NEMO Equipment Disco Men's Endless Promise Down Sleeping Bag 15F or Sea to Summit Spark SpII Ultralight Down Sleeping Bag?
The Sea to Summit Spark SpII Ultralight Down Sleeping Bag wins 1 of the 1 specs we compare head to head; the other wins 0. The NEMO Equipment Disco Men's Endless Promise Down Sleeping Bag 15F is the cheaper at $299.95. Get the Sea to Summit Spark SpII Ultralight Down Sleeping Bag for the stronger spec sheet, the NEMO Equipment Disco Men's Endless Promise Down Sleeping Bag 15F to spend less.
See NEMO Equipment Disco Men's Endless Promise Down Sleeping Bag 15F on Amazon See Sea to Summit 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 | NEMO Equipment Disco Men's Endless Promise Down Sleeping Bag 15F | Sea to Summit 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 — NEMO Equipment Disco Men's Endless Promise Down Sleeping Bag 15F: nemoequipment.com (verified 2026-06-20). Sea to Summit Spark SpII Ultralight Down Sleeping Bag: advnture.com (verified 2026-06-20).
What's the difference between the NEMO Equipment Disco Men's Endless Promise Down Sleeping Bag 15F and Sea to Summit 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: NEMO Equipment Disco Men's Endless Promise Down Sleeping Bag 15F 15 vs Sea to Summit Spark SpII Ultralight Down Sleeping Bag 28
- Fill power: NEMO Equipment Disco Men's Endless Promise Down Sleeping Bag 15F 650 vs Sea to Summit Spark SpII Ultralight Down Sleeping Bag 850
- Shape: NEMO Equipment Disco Men's Endless Promise Down Sleeping Bag 15F spoon vs Sea to Summit Spark SpII Ultralight Down Sleeping Bag mummy
- Packed weight (lb): NEMO Equipment Disco Men's Endless Promise Down Sleeping Bag 15F 2.69 vs Sea to Summit Spark SpII Ultralight Down Sleeping Bag 1.17
- Packed size: NEMO Equipment Disco Men's Endless Promise Down Sleeping Bag 15F 11.5 x 8.5 in vs Sea to Summit Spark SpII Ultralight Down Sleeping Bag 2.5 L (approx. 1-liter bottle size)
- Product note: NEMO Equipment 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 Sea to Summit 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