REI Co-op
REI Co-op Trailmade 20 Sleeping Bag
$100Cheaper
Best Sleeping Bags · head-to-head
REI Co-op Trailmade 20 Sleeping Bag vs Spark SpII Ultralight Down Sleeping Bag
A sourced, side-by-side comparison. REI Co-op Trailmade 20 Sleeping Bag is cheaper at $100. Every spec and price links to its source.
Sea to Summit
Spark SpII Ultralight Down Sleeping Bag
$409
Which is better: the REI Co-op Trailmade 20 Sleeping Bag or Spark SpII Ultralight Down Sleeping Bag?
The Spark SpII Ultralight Down Sleeping Bag wins 1 of the 1 specs we compare head to head; the other wins 0. The REI Co-op Trailmade 20 Sleeping Bag is the cheaper at $100. Get the Spark SpII Ultralight Down Sleeping Bag for the stronger spec sheet, the REI Co-op Trailmade 20 Sleeping Bag to spend less.
See REI Co-op Trailmade 20 Sleeping Bag on Amazon See 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 | REI Co-op Trailmade 20 Sleeping Bag | Spark SpII Ultralight Down Sleeping Bag |
|---|---|---|
| US price | $100 | $409 |
| Brand | REI Co-op | Sea to Summit |
| Released | — | — |
| Temperature rating f | 21 | 28 |
| Insulation type | synthetic | down |
| Fill power | — | 850 |
| Shape | mummy | mummy |
| Packed weight (lb) | 3.29 | 1.17 |
| Packed size | 10 x 13 in | 2.5 L (approx. 1-liter bottle size) |
| Zipper side | — | — |
| Product note | Replaced the discontinued Trailbreak 20; recycled synthetic insulation; ISO Lower Limit 21F, Comfort 31F | Lower limit 28F / -2C; comfort 38F / 4C; Ultra-Dry Down PFAS-free treatment; regular size; 530 g / 18.7 oz |
Sources — REI Co-op Trailmade 20 Sleeping Bag: rei.com (verified 2026-06-20). Spark SpII Ultralight Down Sleeping Bag: advnture.com (verified 2026-06-20).
What's the difference between the REI Co-op Trailmade 20 Sleeping Bag and Spark SpII Ultralight Down Sleeping Bag?
Where the two actually differ on the specs we track (5 of 8). Matching specs are omitted.
- Temperature rating f: REI Co-op Trailmade 20 Sleeping Bag 21 vs Spark SpII Ultralight Down Sleeping Bag 28
- Insulation type: REI Co-op Trailmade 20 Sleeping Bag synthetic vs Spark SpII Ultralight Down Sleeping Bag down
- Packed weight (lb): REI Co-op Trailmade 20 Sleeping Bag 3.29 vs Spark SpII Ultralight Down Sleeping Bag 1.17
- Packed size: REI Co-op Trailmade 20 Sleeping Bag 10 x 13 in vs Spark SpII Ultralight Down Sleeping Bag 2.5 L (approx. 1-liter bottle size)
- Product note: REI Co-op Trailmade 20 Sleeping Bag Replaced the discontinued Trailbreak 20; recycled synthetic insulation; ISO Lower Limit 21F, Comfort 31F vs 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