# Cat's Meow 20 Eco Sleeping Bag vs Sidewinder SL 20 Mummy Sleeping Bag: specs and price compared

A sourced, side-by-side comparison of the Cat's Meow 20 Eco Sleeping Bag (The North Face) and Sidewinder SL 20 Mummy Sleeping Bag (Big Agnes) among sleeping bags. Sidewinder SL 20 Mummy Sleeping Bag is the cheaper of the two at $199.96.

## Side by side

| 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 |
| 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 |

## Key differences

- 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

## Sources

- Cat's Meow 20 Eco Sleeping Bag: https://www.rei.com/product/244004/the-north-face-cats-meow-20-eco-sleeping-bag (rei.com, verified 2026-06-20)
- Sidewinder SL 20 Mummy Sleeping Bag: https://www.bigagnes.com/products/sidewinder-sl-20 (bigagnes.com, verified 2026-06-20)

Canonical: https://frontdeskreview.com/gear/sleeping-bags/the-north-face-cats-meow-20-eco-vs-big-agnes-sidewinder-sl-20/
Cite: Per The Front Desk Review, Cat's Meow 20 Eco Sleeping Bag ($200) vs Sidewinder SL 20 Mummy Sleeping Bag ($199.96) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/sleeping-bags/the-north-face-cats-meow-20-eco-vs-big-agnes-sidewinder-sl-20/
License: CC BY 4.0.