Featuring a body-mapped mix of synthetic and hydrophobic down insulations, the Marmot Datum 0 Degree sleeping bag expertly balances thermal efficiency, weight and comfort for cold weather backpacking and camping.
Extensive scientific research and testing to optimize body mapping of different insulation types resulted in Marmot’s creation of the Datum 0 Degree sleeping bag, which is a member of Marmot’s family of Composite Bags. This unique construction combines certified 650 fill power down treated with Marmot’s Down Defender water repellent treatment that allows the down to stay drier 10 times longer than untreated down in damp conditions with Marmot’s Spirafil synthetic fill to optimize warmth while reducing weight and bulk. The down layer is situated within the top side of the bag to provide extra warmth to the core of the body while the synthetic insulation fills the back side of the bag to provide maximum warmth in compression zones between the body and the ground or sleeping pad. Over all, body-mapped insulation allows the Datum 0 Degree bag to offer superior thermal efficiency without bulkiness or added weight.
Other features found in the Datum 0 Degree include a contoured, ergonomic hood that helps reduce heat loss and keeps your head warm and comfortable. A snagless draft tube sewn behind the full length zipper keeps cold air from reaching the inside of the sleeping bag and zippers from getting caught and creating damaging tears in the fabric. A Velcro-free face muff, two hang loops and zipper guards are also integrated.
The Marmot Datum 0 Degree sleeping bag is available in two sizes. The Regular size fits individuals up to 6’0” tall and the Long fits up to 6’6”. For your convenience, a stuff and storage sack is included with each Datum 0 Degree bag.
- Marmot Composite Construction combines 650 fill power down and thermally efficient SpiraFil insulation
- Body-mapped insulation yields maximum thermal efficiency without added weight
- Certified 650 fill power down
- 3D hood construction
- Full length locking YKK two way zipper
- Down Defender to improve water resistance in wet conditions
- Internal stash pocket
- Stuff and Storage Sack Included
Best Use Backpacking, Camping Insulation Type Hybrid Item Weight Regular: 3 lbs 10 oz
Long: 4 lbs 1.5 oz
Other Stuff Sack and Storage Sack Included Warranty Limited Lifetime Packed Size Regular: 9.5" x 19"
Long: 9.5" x 19"
Shell Material 30D 100% Nylon Ripstop DWR 1.5 oz/yd/70D 100% Polyester 2.2 oz/yd Liner Material 30D 100% Nylon DWR 1.27 oz/yd Fits to Length Regular: 6' 0"
Long: 6' 6"
Fits to Girth Regular: 61"
Fill Material Spirafil/650 Fill Power Down Temperature Rating 0 Degrees F
Real Customer Reviews
Earn Gear Points for Reviewing Products
Join our FREE Inside Edge program and receive 20% off a full-price item. Earn discount points for reviewing items you purchase and receive exclusive discounts.
What are points?
As a member you can share reviews of items you purchase and we'll reward you with discount points valued at 5% of the item's original purchase price.
It’s EASY and it’s FREE.Sign Up Today »