How to Choose Sleeping Bags for Backpacking
Therm-a-Rest Parsec 20 Sleeping Bag
$469.95 – to $499.95
When your plans are ambitious, this Therm-a-Rest down sleeping bag is your best friend. It delivers ultralight comfort for alpine nights. And it's now filled with compressible 900-fill-power down.
Key Details
Fill
900-fill-power PFAS-free hydrophobic duck down (RDS)
Weight
Regular: 1 lb. 13 oz.
Long: 1 lb. 15 oz.
Compressed Volume
21.6 liters
Temperature Rating (F)
20 degrees (F)
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- 100% recycled shell and liner fabrics are eco-friendly while being lightweight, soft and durable
- Now with premium 900-fill-power hydrophobic down insulation; more down than ever before provides exceptional warmth
- 900-fill-power down provides excellent loft and compression
- Down is RDS-certified and PFAS-free
- Responsible Down Standard (RDS) certification ensures the waterfowl in the down supply chain are treated humanely
- Bag fit is designed for the ideal blend of comfort, heat retention and packability
- Updated baffle design maximizes warmth and trims weight by concentrating down where you need it most
- Rapidly heat cold feet with a baffled, ergonomic and insulated Toe-asisâ„¢ foot warmer pocket in the footbox that helps concentrate warmth
- YKK® antisnag zipper prevents accidental tears and eases entry and exit
- Quilt and blanket loops let you customize your sleep system by layering quilts or tech blankets for increased warmth
- Internal stash pocket holds your phone to preserve battery against the cold or keeps a small water filter from freezing
- Cinchable hood and draft tubes along zipper and neck help to retain warmth
- Compression 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 | 18 degrees (F) - ISO |
| Tested Comfort | 29 degrees (F) - ISO |
| Temperature Rating (F) | 20 degrees (F) |
| Temperature Rating (C) | -6 degrees (C) |
| Weight | Regular: 1 lb. 13 oz. Long: 1 lb. 15 oz. |
| Ultralight | Yes |
| Shell | 20-denier 100% recycled nylon |
| Zipper Location | Left |
| Insulation Type | Down |
| Water-Resistant Down | Yes |
| Fill | 900-fill-power PFAS-free hydrophobic duck down (RDS) |
| Fill Weight | Regular: 1 lb. 1 oz. Long: 1 lb. 3 oz. |
| Sleeping Capacity | 1-person |
| Lining | 20-denier 100% recycled nylon |
| Sleeping Bag Shape | Mummy |
| Fits Up To (in.) | Regular: 72 inches Long: 78 inches |
| Shoulder Girth (in.) | Regular: 62 inches Long: 65 inches |
| Hip Girth (in.) | Regular: 56 inches Long: 58 inches |
| Stuff Sack Size | 7 x 19 inches |
| Stuff Sack Volume | 12 liters |
| Compressed Volume | 21.6 liters |
| Gender | Unisex |
| Sustainability | Contains recycled materials Down certified to the Responsible Down Standard (RDS) |
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