Best synthetic backup
Marmot Trestles Elite Eco 30
Marmot · Lower mid · Heavier than down
Synthetic fill that still insulates when it is damp, at the cost of pack space.
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If your trips are dry alpine, down is lighter. If your trips are coastal fog, boat spray, or river country, synthetic is the rational fill. This is a 30°F-class bag, so it is a summer and mild-fall tool, not a frost bag for cold sleepers. The bulk is the price of the insurance.
Who should buy it. Campers who cannot promise a dry bag.
Best for. Wet climates and bags that may get damp
Standout limitation. Bulk in the pack

Specs
- Rating class
- 30°F
- Fill
- Synthetic
- Use
- Mild and wet
Pros
- Works when damp
- Easier care
- Lower price than premium down
Cons
- Packs larger
- Heavier for the rating
Not sold on Amazon US.
Closest on Amazon: Marmot Trestles 30 Sleeping Bag. The previous generation of the same Marmot Trestles 30 synthetic bag, with the same 30°F rating.
Check current price on the listing.
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