NEMO Equipment
NEMO Equipment Disco Men's Endless Promise Down Sleeping Bag 15F
$299.95
Released 2024
Best Sleeping Bags · head-to-head
NEMO Equipment Disco Men's Endless Promise Down Sleeping Bag 15F vs Big Agnes Sidewinder SL 20 Mummy Sleeping Bag
A sourced, side-by-side comparison. Big Agnes Sidewinder SL 20 Mummy Sleeping Bag is cheaper at $199.96. Every spec and price links to its source.
Big Agnes
Big Agnes Sidewinder SL 20 Mummy Sleeping Bag
$199.96Cheaper
Which is better: the NEMO Equipment Disco Men's Endless Promise Down Sleeping Bag 15F or Big Agnes Sidewinder SL 20 Mummy Sleeping Bag?
The Big Agnes Sidewinder SL 20 Mummy Sleeping Bag wins 1 of the 1 specs we compare head to head; the other wins 0. The Big Agnes Sidewinder SL 20 Mummy Sleeping Bag is the cheaper at $199.96. The Big Agnes Sidewinder SL 20 Mummy Sleeping Bag both leads on specs and costs less — the straightforward pick.
See NEMO Equipment Disco Men's Endless Promise Down Sleeping Bag 15F on Amazon See Big Agnes Sidewinder SL 20 Mummy 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 | Big Agnes Sidewinder SL 20 Mummy Sleeping Bag |
|---|---|---|
| US price | $299.95 | $199.96 |
| Brand | NEMO Equipment | Big Agnes |
| Released | 2024 | — |
| Temperature rating f | 15 | 20 |
| Insulation type | down | down |
| Fill power | 650 | 650 |
| Shape | spoon | mummy |
| Packed weight (lb) | 2.69 | 2.25 |
| Packed size | 11.5 x 8.5 in | 6.5 x 8 in |
| Zipper side | left | center |
| Product note | Classic Spoon shape (mummy variant with extra shoulder/hip width); 650 FP PFAS-free hydrophobic RDS-certified down; Thermo Gill vents | 650-fill DownTek hydrophobic down with body-mapped FireLine ECO synthetic at pressure points; designed for side sleepers; center ambidextrous zipper |
Sources — NEMO Equipment Disco Men's Endless Promise Down Sleeping Bag 15F: nemoequipment.com (verified 2026-06-20). Big Agnes Sidewinder SL 20 Mummy Sleeping Bag: campman.com (verified 2026-06-20).
What's the difference between the NEMO Equipment Disco Men's Endless Promise Down Sleeping Bag 15F and Big Agnes Sidewinder SL 20 Mummy 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 Big Agnes Sidewinder SL 20 Mummy Sleeping Bag 20
- Shape: NEMO Equipment Disco Men's Endless Promise Down Sleeping Bag 15F spoon vs Big Agnes Sidewinder SL 20 Mummy Sleeping Bag mummy
- Packed weight (lb): NEMO Equipment Disco Men's Endless Promise Down Sleeping Bag 15F 2.69 vs Big Agnes Sidewinder SL 20 Mummy Sleeping Bag 2.25
- Packed size: NEMO Equipment Disco Men's Endless Promise Down Sleeping Bag 15F 11.5 x 8.5 in vs Big Agnes Sidewinder SL 20 Mummy Sleeping Bag 6.5 x 8 in
- Zipper side: NEMO Equipment Disco Men's Endless Promise Down Sleeping Bag 15F left vs Big Agnes Sidewinder SL 20 Mummy Sleeping Bag center
- 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 Big Agnes Sidewinder SL 20 Mummy Sleeping Bag 650-fill DownTek hydrophobic down with body-mapped FireLine ECO synthetic at pressure points; designed for side sleepers; center ambidextrous zipper