# REI Co-op Trailmade 20 Sleeping Bag vs UltraLite Sleeping Bag: specs and price compared

A sourced, side-by-side comparison of the REI Co-op Trailmade 20 Sleeping Bag (REI Co-op) and UltraLite Sleeping Bag (Western Mountaineering) among sleeping bags. REI Co-op Trailmade 20 Sleeping Bag is the cheaper of the two at $100.

## Side by side

| Spec | REI Co-op Trailmade 20 Sleeping Bag | UltraLite Sleeping Bag |
| --- | --- | --- |
| US price | $100 | $660 |
| Brand | REI Co-op | Western Mountaineering |
| Temperature rating f | 21 | 20 |
| Insulation type | synthetic | down |
| Fill power | — | 850 |
| Shape | mummy | mummy |
| Packed weight (lb) | 3.29 | 1.81 |
| Packed size | 10 x 13 in | 7 x 13 in |
| Zipper side | — | left or right |
| Product note | Replaced the discontinued Trailbreak 20; recycled synthetic insulation; ISO Lower Limit 21F, Comfort 31F | 850+ FP ethically-sourced premium goose down; USA made; full-length #5 YKK zipper; 6'0" version weighs 1 lb 13 oz |

## Key differences

- Temperature rating f: REI Co-op Trailmade 20 Sleeping Bag 21 vs UltraLite Sleeping Bag 20
- Insulation type: REI Co-op Trailmade 20 Sleeping Bag synthetic vs UltraLite Sleeping Bag down
- Packed weight (lb): REI Co-op Trailmade 20 Sleeping Bag 3.29 vs UltraLite Sleeping Bag 1.81
- Packed size: REI Co-op Trailmade 20 Sleeping Bag 10 x 13 in vs UltraLite Sleeping Bag 7 x 13 in
- Product note: REI Co-op Trailmade 20 Sleeping Bag Replaced the discontinued Trailbreak 20; recycled synthetic insulation; ISO Lower Limit 21F, Comfort 31F vs UltraLite Sleeping Bag 850+ FP ethically-sourced premium goose down; USA made; full-length #5 YKK zipper; 6'0" version weighs 1 lb 13 oz

## Sources

- REI Co-op Trailmade 20 Sleeping Bag: https://www.rei.com/product/217592/rei-co-op-trailmade-20-sleeping-bag (rei.com, verified 2026-06-20)
- UltraLite Sleeping Bag: https://www.westernmountaineering.com/product/ultralite/ (westernmountaineering.com, verified 2026-06-20)

Canonical: https://frontdeskreview.com/gear/sleeping-bags/rei-coop-trailmade-20-vs-western-mountaineering-ultralite/
Cite: Per The Front Desk Review, REI Co-op Trailmade 20 Sleeping Bag ($100) vs UltraLite Sleeping Bag ($660) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/sleeping-bags/rei-coop-trailmade-20-vs-western-mountaineering-ultralite/
License: CC BY 4.0.