Therm-a-Rest Saros Sleeping Bag
Best synthetic insulation choice for backpackers in damp climates.
This is the ultimate insurance policy for wet, unpredictable backcountry nights where down insulation would simply fail. You sacrifice the ultralight packability of premium down, but you gain the peace of mind that comes with synthetic fill that stays warm even when damp.
$138.99
at
Sherper's
More Saros options
Who it's for
- Backpackers frequently camping in wet or humid environments
- Active sleepers who toss and turn throughout the night
- Side sleepers needing more wiggle room than traditional mummy bags
Who should skip it
- Ultralight hikers prioritizing minimal pack volume and weight
- Long-distance trekkers sensitive to every ounce in their kit
- Campers seeking a single bag for extreme seasonal temperature swings
Performance breakdown
Damp-weather performance
Synthetic insulation maintains critical loft even when moisture levels spike.
Sleep system integration
Pad connectors effectively eliminate the dreaded midnight slide off your mat.
Ergonomic comfort
The W.A.R.M. fit offers ample room for side sleepers to shift.
Thermal efficiency
Zoned insulation placement keeps heat where you need it most.
Weight-to-warmth ratio
Solid warmth, though synthetic fill adds bulk compared to premium down.
Foot box warmth
Dedicated pocket design prevents cold spots during freezing shoulder-season nights.
Key Specs
Temperature Rating
20 degrees Fahrenheit
Weight
3.19 lbs
Insulation Type
Synthetic
Shell Material
Polyester
Lining Material
Polyester
Sleeping Bag Shape
W.A.R.M. fit
Zipper Location
Left and Right
Water Resistant
Yes
Season Rating
3-Season
Max User Height
80 inches
Know before you buy
Still have a question?
Ask Metto anything about the Therm-a-Rest Saros Sleeping Bag before you decide.
