Bring your bed to the backcountry in the most comfortable, efficient way possible, thanks to the Sierra Designs Backcountry Bed SYN Sleeping Bag. This line of bags from Sierra Designs represents an abrupt departure from anything we've previously seen in the sleeping bag world, thanks to its zipperless design and integrated comforter. The comforter can be left out of the bag on warmer nights, acting as a cover that can be rolled down or pulled up, or, on colder nights, can be tucked back around you forming a draft tube and sealing you off from the cold. The face opening closes as the sides of the bag are pushed outward, always maintaining the correct shape. Insulated hand and arm pockets on the outside of the comforter let you keep insulation under your arms, even when they're outside of the bag. A sleeping pad sleeve helps to keep everything in place by not allowing you to inadvertently slide off your insulation during your nightly dream workouts. To further the comfort range of this bag, Sierra Designs added a self sealing, hands free foot vent that allows you to stick one or both feet out to cool down, then pull them back in again, all without having to reach down with your hands.