Therm-a-Rest Parsec 32F/0C Ultralight Down Mummy Bag
★★★★☆ 4.4 (9)
800-fill hydrophobic down dries three times faster
$233.89
Hydrophobic down, smart zoning and pad-friendly quilts — from 15-ounce summer quilts to a -20°F winter bag.
10 of 10 bags & quilts
★★★★☆ 4.4 (9)
800-fill hydrophobic down dries three times faster
$233.89
Patent-pending WarmZip center zipper adjusts shape and warmth
$299.95
Rated 0°F for four-season fast-and-light trips
$599.95
Summer-weight 32°F rating
$289.95
Box-baffled 650-fill down for cool three-season nights
$309.95
No back panel — your insulated pad does that job
$459.95
Lighter 32°F rating for summer and early fall
$259.95 $359.95
Under a pound in the Regular size
$399.95
900-fill, PFAS-free hydrophobic down in zoned baffles
$469.95
Snorkel hood with condensation-resistant synthetic lining
$789.95
A mummy sleeping bag wraps you completely and seals out drafts, which is why our Parsec and Polar Ranger bags are made for alpine and winter nights. A quilt skips the back panel — the insulation you'd crush anyway — and relies on your insulated sleeping pad underneath. Our Vesper quilts weigh as little as 15 ounces with 900-fill down; the Corus quilts use 650-fill down in box baffles for a lower price.
We list ratings in Fahrenheit and Celsius: 32°F/0°C for summer, 20°F/-6°C for three seasons, 0°F/-18°C for shoulder-season alpine trips and -20°F/-30°C for deep winter. Pair the bag with a pad of matching R-value; a warm bag on a thin pad still sleeps cold.
The Boost 650 comes in six sizes, including Wide versions of every length, and its center WarmZip lets you pull the bag in around you for an extra ten degrees. Arm holes make it easy to read or make coffee without climbing out.
