How to Choose Sleeping Bags for Backpacking
Therm-a-Rest Saros 0F Sleeping Bag
$188.73Compared to $269.95*Save 30%
When the weather gets frigid and the forecast looks damp, the Therm-a-Rest Saros 0F sleeping bag keeps you resting better. It has quick-drying and weather-resistant eraLoft™ synthetic insulation.
Key Details
Fill
eraLoft polyester hollow fiber
Weight
Long: 5 lbs. 4 oz.
Compressed Volume
18.7 liters
Temperature Rating (F)
0 degrees (F)
- eraLoft™ insulation is efficient and compressible; the water-resistant synthetic fill uses hollow fibers to reduce weight without sacrificing warmth
- Zoned insulation maximizes warmth and saves weight by intentionally placing fill where you need it most
- With Additional Room for Multiple positions (W.A.R.M.) fit means this bag allows for various natural sleep positions while maintaining thermal efficiency
- Removable, ultralight SynergyLink™ Connector straps create a secure bag-to-sleeping pad connection to optimize the comfort and thermal efficiency of your entire sleep system
- SynergyLink Connectors function best with regular-sized sleeping pads that are 3 in. thick or less when inflated
- Quilt and blanket loops let you customize your sleep system by layering Therm-a-Rest quilts or tech blankets (not included) for increased warmth
- Cinchable hood and heat-trapping draft collar
- Full-length zipper draft tube and snag-free zipper
- Toe-asis™ foot warmer pocket creates an ergonomic toe box that rapidly warms cold feet in a pocket of warm insulation
- External zippered pocket
- Compression sack and storage sack included
Imported.
Temperature ratings are intended as a guideline to help you compare products, rather than a guarantee of warmth, since many different factors contribute to your comfort while you sleep. Backpacking bags are typically rated for temperature according to an independent testing protocol—currently International Organization for Standardization (ISO) 23537, though some older items followed European Norm (EN) 13537. Testing is based on a person wearing one base layer and a pair of socks, sleeping on an insulated surface with a minimum R-value of 5.38.
Each bag then gets 2 ratings: the Comfort rating is the lowest temperature at which the bag will keep the average "cold sleeper" comfortable, and the Lower Limit rating is the lowest temperature at which the bag will keep the average "warm sleeper" comfortable. Some brands determine their own temperature rating by aligning to the Comfort rating for women’s bags, to the Lower Limit rating for men’s bags, or somewhere in the middle for nongendered bags.
View all Therm-a-Rest Backpacking Sleeping BagsEach bag then gets 2 ratings: the Comfort rating is the lowest temperature at which the bag will keep the average "cold sleeper" comfortable, and the Lower Limit rating is the lowest temperature at which the bag will keep the average "warm sleeper" comfortable. Some brands determine their own temperature rating by aligning to the Comfort rating for women’s bags, to the Lower Limit rating for men’s bags, or somewhere in the middle for nongendered bags.
| Best Use | Backpacking |
|---|---|
| Tested Lower Limit | 0 degrees F - ISO degrees (F) - ISO |
| Tested Comfort | 14 degrees F - ISO degrees (F) - ISO |
| Temperature Rating (F) | 0 degrees (F) |
| Temperature Rating (C) | -18 degrees (C) |
| Weight | Long: 5 lbs. 4 oz. |
| Shell | 20-denier polyester with durable water repellent (DWR) |
| Zipper Location | Left |
| Insulation Type | Synthetic |
| Fill | eraLoft polyester hollow fiber |
| Fill Weight | Long: 4 lbs. 7 oz. |
| Sleeping Capacity | 1-person |
| Lining | 20-denier polyester taffeta |
| Sleeping Bag Shape | Mummy |
| Fits Up To (in.) | Long: 78 inches |
| Shoulder Girth (in.) | Long: 66 inches |
| Hip Girth (in.) | Long: 64 inches |
| Stuff Sack Size | 11 x 28 inches |
| Stuff Sack Volume | 43.6 liters |
| Compressed Volume | 18.7 liters |
| Gender | Unisex |
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