Zpacks Mummy Sleeping Bag 20F
 
Weight 22.0 oz / 625 g
 
Constructed with responsibly sourced and 'Responsible Down Standard' certified DownTek PCF-FREE water-resistant 900 fill power goose down which stays dry 90% longer than untreated down.
 
Each compartment is overstuffed with 30% more 900 Fill Power Premium Goose Down than is necessary for maximum loft to account for any future down compression.
 
Vertical baffles on the upper body keep down from migrating to the sides. Tightly spaced compartments help keep the down evenly distributed so there are no cold spots. There are no "sewn through" seams.  
 
Our rectangular foot box is roomy, and fits the shape of your feet comfortably when lying on your side, on your stomach, or on your back with your feet angled out in a relaxed position. 
 
Black fabric on the inside for quick drying. Both the liner and the shell are treated with PFC Free C0 durable water repellent to resist rain spray and body moisture. 
 
Integrated hood with cinch cord provides full protection from the elements for cold nights on trail.
 
Full length two way side zipper extends around the bottom of the bag allowing you to fully open the bag like a blanket.
 
You can open the bottom end and vent your feet, or flip the bag around and wear it as a cape in camp on cold mornings.
 
A draft tube stops cold air from passing through the zipper. 
 
A zipper guard is in place to prevent the zipper from snagging on the draft tube or sleeping bag material.
 
A snap at the top of the zipper keeps the zipper securely closed.   
 
Our mummy bag maintains its full width at the neck/shoulders. You can hang your arms out to vent, or reach out without unzipping or feeling trapped in a straight jacket like many other ultralight mummy bags.
 
An Elastic cord can be cinched tight around your neck to keep out drafts, or pull the bag up around your ears.
 
Shock cord can be cinched independently at the neck and hood to keep out drafts and snug the hood down around your face.
 
A Roll Top Dry Bag is included, and adds ~.9 ounces (25.5 grams) to the listed weight. The dry bags are a comfortable fit and can be compressed smaller by squishing the contents and rolling the top down more.
 
Our sleeping bag shell materials do not contain any harmful chemicals such as flame retardants. Our shell is treated with C0 Durable Water Repellent, which is free of PFOA and PFOs