The North Face
Cat's Meow 20 Eco Sleeping Bag
$200
Best Sleeping Bags · head-to-head
Cat's Meow 20 Eco Sleeping Bag vs Sidewinder SL 20 Mummy Sleeping Bag
A sourced, side-by-side comparison. Sidewinder SL 20 Mummy Sleeping Bag is cheaper at $199.96. Every spec and price links to its source.
Big Agnes
Sidewinder SL 20 Mummy Sleeping Bag
$199.96Cheaper
Which is better: the Cat's Meow 20 Eco Sleeping Bag or Sidewinder SL 20 Mummy Sleeping Bag?
The Sidewinder SL 20 Mummy Sleeping Bag wins 1 of the 1 specs we compare head to head; the other wins 0. The Sidewinder SL 20 Mummy Sleeping Bag is the cheaper at $199.96. The Sidewinder SL 20 Mummy Sleeping Bag both leads on specs and costs less — the straightforward pick.
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Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | Cat's Meow 20 Eco Sleeping Bag | Sidewinder SL 20 Mummy Sleeping Bag |
|---|---|---|
| US price | $200 | $199.96 |
| Brand | The North Face | Big Agnes |
| Released | — | — |
| Temperature rating f | 20 | 20 |
| Insulation type | synthetic | down |
| Fill power | — | 650 |
| Shape | mummy | mummy |
| Packed weight (lb) | 2.71 | 2.25 |
| Packed size | 10 x 18 in | 6.5 x 8 in |
| Zipper side | — | center |
| Product note | Heatseeker Eco recycled synthetic insulation; ISO comfort 30F, lower limit 21F; pad-attachment system; regular weight 1,231 g | 650-fill DownTek hydrophobic down with body-mapped FireLine ECO synthetic at pressure points; designed for side sleepers; center ambidextrous zipper |
Sources — Cat's Meow 20 Eco Sleeping Bag: rei.com (verified 2026-06-20). Sidewinder SL 20 Mummy Sleeping Bag: bigagnes.com (verified 2026-06-20).
What's the difference between the Cat's Meow 20 Eco Sleeping Bag and Sidewinder SL 20 Mummy Sleeping Bag?
Where the two actually differ on the specs we track (4 of 8). Matching specs are omitted.
- Insulation type: Cat's Meow 20 Eco Sleeping Bag synthetic vs Sidewinder SL 20 Mummy Sleeping Bag down
- Packed weight (lb): Cat's Meow 20 Eco Sleeping Bag 2.71 vs Sidewinder SL 20 Mummy Sleeping Bag 2.25
- Packed size: Cat's Meow 20 Eco Sleeping Bag 10 x 18 in vs Sidewinder SL 20 Mummy Sleeping Bag 6.5 x 8 in
- Product note: Cat's Meow 20 Eco Sleeping Bag Heatseeker Eco recycled synthetic insulation; ISO comfort 30F, lower limit 21F; pad-attachment system; regular weight 1,231 g vs 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