# Trestles Elite Eco 20 Sleeping Bag vs Spark SpII Ultralight Down Sleeping Bag: specs and price compared

A sourced, side-by-side comparison of the Trestles Elite Eco 20 Sleeping Bag (Marmot) and Spark SpII Ultralight Down Sleeping Bag (Sea to Summit) among sleeping bags. Trestles Elite Eco 20 Sleeping Bag is the cheaper of the two at $200.

## Side by side

| Spec | Trestles Elite Eco 20 Sleeping Bag | Spark SpII Ultralight Down Sleeping Bag |
| --- | --- | --- |
| US price | $200 | $409 |
| Brand | Marmot | Sea to Summit |
| 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 |

## Key differences

- Temperature rating f: Trestles Elite Eco 20 Sleeping Bag 20 vs Spark SpII Ultralight Down Sleeping Bag 28
- Insulation type: Trestles Elite Eco 20 Sleeping Bag synthetic vs Spark SpII Ultralight Down Sleeping Bag down
- Packed weight (lb): Trestles Elite Eco 20 Sleeping Bag 2.37 vs Spark SpII Ultralight Down Sleeping Bag 1.17
- Packed size: Trestles Elite Eco 20 Sleeping Bag 9.4 x 18.9 in vs Spark SpII Ultralight Down Sleeping Bag 2.5 L (approx. 1-liter bottle size)
- Product note: 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 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

## Sources

- Trestles Elite Eco 20 Sleeping Bag: https://www.rei.com/product/144180/marmot-trestles-elite-eco-20-sleeping-bag-mens (rei.com, verified 2026-06-20)
- Spark SpII Ultralight Down Sleeping Bag: https://www.advnture.com/reviews/sea-to-summit-spark-spii-sleeping-bag (advnture.com, verified 2026-06-20)

Canonical: https://frontdeskreview.com/gear/sleeping-bags/marmot-trestles-elite-eco-20-vs-sea-to-summit-spark-spii/
Cite: Per The Front Desk Review, Trestles Elite Eco 20 Sleeping Bag ($200) vs Spark SpII Ultralight Down Sleeping Bag ($409) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/sleeping-bags/marmot-trestles-elite-eco-20-vs-sea-to-summit-spark-spii/
License: CC BY 4.0.