Therm-a-Rest Parsec 0 Sleeping Bag

$599.95 – $649.95

When the forecast calls for cold, you can rely on this Therm-a-Rest sleeping bag. The 900-fill-power down provides year-round comfort with minimal weight. It's perfect for chilly alpine nights.

Location Image for Parsec 0 Sleeping Bag

Fill

900-fill-power PFAS-free hydrophobic duck down (RDS)

Weight

Regular: 2 lbs. 7 oz.

Long: 2 lbs. 10 oz.

Compressed Volume

10.8 liters

Temperature Rating (F)

0 degrees (F)

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 to provide 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-asis™ 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 Bags

Best Use	Backpacking
Tested Lower Limit	0 degrees (F) - ISO
Tested Comfort	14 degrees (F) - ISO
Temperature Rating (F)	0 degrees (F)
Temperature Rating (C)	-18 degrees (C)
Weight	Regular: 2 lbs. 7 oz. Long: 2 lbs. 10 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. 11 oz. Long: 1 lb. 14 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: 57 inches Long: 58 inches
Stuff Sack Size	7.5 x 21 inches
Stuff Sack Volume	15 liters
Compressed Volume	10.8 liters
Gender	Unisex
Sustainability	Down certified to the Responsible Down Standard (RDS) Contains recycled materials