Marmot
Marmot Trestles Elite Eco 20 Sleeping Bag
$200Cheaper
Best Sleeping Bags · head-to-head
Marmot Trestles Elite Eco 20 Sleeping Bag vs Sea to Summit Spark SpII Ultralight Down Sleeping Bag
A sourced, side-by-side comparison. Marmot Trestles Elite Eco 20 Sleeping Bag is cheaper at $200. Every spec and price links to its source.
Sea to Summit
Sea to Summit Spark SpII Ultralight Down Sleeping Bag
$409
Which is better: the Marmot Trestles Elite Eco 20 Sleeping Bag or Sea to Summit Spark SpII Ultralight Down Sleeping Bag?
The Sea to Summit Spark SpII Ultralight Down Sleeping Bag wins 1 of the 1 specs we compare head to head; the other wins 0. The Marmot Trestles Elite Eco 20 Sleeping Bag is the cheaper at $200. Get the Sea to Summit Spark SpII Ultralight Down Sleeping Bag for the stronger spec sheet, the Marmot Trestles Elite Eco 20 Sleeping Bag to spend less.
See Marmot Trestles Elite Eco 20 Sleeping Bag on Amazon See Sea to Summit 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 | Marmot Trestles Elite Eco 20 Sleeping Bag | Sea to Summit Spark SpII Ultralight Down Sleeping Bag |
|---|---|---|
| US price | $200 | $409 |
| Brand | Marmot | Sea to Summit |
| Released | — | — |
| Temperature rating f | 20 | 28 |
| Insulation type | synthetic | down |
| Fill power | — | 850 |
| Shape | mummy | mummy |
| Packed weight (lb) | 2.37 | 1.17 |
| Packed size | 9.4 x 18.9 in | 2.5 L (approx. 1-liter bottle size) |
| Zipper side | left | — |
| Product note | HL-ElixR Eco Micro recycled synthetic insulation; dual-zipper with secondary vent zip; ISO comfort 32F, lower limit 21.6F; listed weight 1,077 g | Lower limit 28F / -2C; comfort 38F / 4C; Ultra-Dry Down PFAS-free treatment; regular size; 530 g / 18.7 oz |
Sources — Marmot Trestles Elite Eco 20 Sleeping Bag: rei.com (verified 2026-06-20). Sea to Summit Spark SpII Ultralight Down Sleeping Bag: advnture.com (verified 2026-06-20).
What's the difference between the Marmot Trestles Elite Eco 20 Sleeping Bag and Sea to Summit 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: Marmot Trestles Elite Eco 20 Sleeping Bag 20 vs Sea to Summit Spark SpII Ultralight Down Sleeping Bag 28
- Insulation type: Marmot Trestles Elite Eco 20 Sleeping Bag synthetic vs Sea to Summit Spark SpII Ultralight Down Sleeping Bag down
- Packed weight (lb): Marmot Trestles Elite Eco 20 Sleeping Bag 2.37 vs Sea to Summit Spark SpII Ultralight Down Sleeping Bag 1.17
- Packed size: Marmot Trestles Elite Eco 20 Sleeping Bag 9.4 x 18.9 in vs Sea to Summit Spark SpII Ultralight Down Sleeping Bag 2.5 L (approx. 1-liter bottle size)
- Product note: Marmot Trestles Elite Eco 20 Sleeping Bag HL-ElixR Eco Micro recycled synthetic insulation; dual-zipper with secondary vent zip; ISO comfort 32F, lower limit 21.6F; listed weight 1,077 g vs Sea to Summit 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