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Sierra Designs Mobile Mummy 600F 3 Season Sleeping Bag

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Item # SDE95201M

The innovative Sierra Designs Mobile Mummy 600F 3-Season sleeping bag includes armholes a jacket-style hood and a stowable footbox so you can actually wear it around camp. Water-resistant down insulation provides all-weather performance.




With "garment-style" construction the innovative Sierra Designs Mobile Mummy 600F 3-Season sleeping bag includes armholes a jacket-style hood and a stowable footbox so you can literally wear it around camp. Featuring 600 fill duck DriDown water-resistant down insulation the bag offers all-weather performance.

Renowned for their efficiency in retaining heat and compressible properties the feathers and fibers of down have an incredibly soft comfortable feel and despite advances in synthetic materials continue to provide the best warmth-to-weight ratio of any insulation available. The one inherent weakness of down insulation is that it loses much of its ability to maintain warmth when it gets wet but the DriDown featured in the Mobile Mummy 600F 3-Season bag performs differently. Employing a unique innovative polymer application DriDown actually creates a hydrophobic finish on each individual plume of down. This treatment results in insulation that stays dry up to 10 times longer and dries 33% faster should it become wet than untreated down bags.

Unlike traditional mummy-style sleeping bags which can be restrictive for campers who tend to change position frequently throughout the night or who don’t sleep stick-straight on their backs the Mobile Mummy bag is designed to move with you whether you’re fast asleep or up and about making breakfast in camp. The garment-style design through the shoulders allows the bag to rest there instead of your head so if you sit up with the hood on the Mobile Mummy sits up too without applying uncomfortable pressure to your head and neck. And that hood has no cords or toggles but just fits snug around your face like the hood on your favorite insulated jacket. The armports are zipperless and also free of any other uncomfortable hardware like toggles or hook and loop closures. They like the hood central zipper draft collar draft tube and draft curtains are all reinforced with additional interior down baffling to prevent cold air drafts. The centrally placed 58" zipper is dual sliding which allows you to vent the bag or put your feet out to stand up and move about – the footbox can be tucked up with toggles to stay off the ground when you’re walking!

The Sierra Designs Mobile Mummy 600F 3-Season sleeping bag is available in Regular (fits up to 6' 0") and Long (fits up to 6' 6") sizes. A stuff sack and storage sack are included.

California residents: view proposition 65 WARNING

  • 600 Fill Duck DriDown
  • Ultralight jacket hood with no cords or toggles
  • Zipperless armports
  • Garment-style shoulder design
  • Centrally placed, ventable zipper



Best Use Backpacking, Camping
Insulation Type Down
Warranty Limited Lifetime
Type Down
Temperature Rating 16 Degrees F
Shell Material 30D Polyester Ripstop
Packed Size Regular: 8" x 16"
Long: 8.5" x 17"
Other Stuff Sack and Storage Sack Included
Liner Material 30D Poleyester Taffetta
Item Weight Regular: 2 lb 11 oz
Long: 2 lb 14 oz
Fits to Length Regular: 6' 0"
Long: 6' 6"
Fill Material 600 Fill Duck DriDown
EN Lower Limit Rating 16 Degrees F
EN Comfort Rating 27 Degrees F


Real Customer Reviews

Average Rating:
(based on 3 real customer reviews)

3 Items

Great bag!
Reviewed by Robert H. - March 12, 2018

Likes: I’m 6 4” and it’s quite difficult to find bags that perform as well as fit while maintaining low weight. This bag accomplishes all of these. It’s ability to allow free range of both arms and legs makes it a must have for those cold mornings where you need to make a coffee but don’t want to get out of your bag. Unzipping everything in the summertime helps cool it off and makes for an all around great 3 season bag. 5 star rating.

Dislikes: None.

Warm and Comfy
Reviewed by Troy H. - July 31, 2017

Likes: Ability to move around camp on a cold morning without getting out of the bag and getting fully dressed.

Dislikes: Wish the foot box had a zipper or opening at the very bottom of the bag.

Everything I wanted in a sleeping bag and more
Reviewed by Ronnie G. - March 24, 2016

Likes: I purchased the mobile mummy to use as part of my sleep system for winter camping in a hammock. Performed better then expected.

Dislikes: None - love it

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