The North Face have introduced an ingenious 3-in-1 sleeping system, one sleeping bag for all seasons. The North Face One Bag
has interchangeable layers to configure it for 5, 20 or 40?F temps,
making it the ultimate modular sleeping bag for any condition. Each
season has different requirements when it comes to warmth, this bag
works with top and bottom layers of synthetic insulation, and sandwiched
between them is a removable layer of 800-fill down that brings the
bag?s temp rating to 5 degrees. Take it road tripping, camping or
backpacking in any season.
