Abstract: A dual air chamber structure having two independent and air impervious chambers, with each chamber being inflated and deflated by a separate air valve. The inner chamber, except for its air valve, is completely contained by the outer chamber and is comprised of a primary horizontal conduit and a plurality of inflatable intermittent vertical posts made of small diameter tubing which are connected by a corresponding plurality of horizontal conduit made of small diameter tubing, such that the inner chamber as a whole is comprised of a repeating series of inflatable vertical posts followed by inflatable horizontal connectors. The outer chamber forms an air impervious bladder around the inner chamber, except for the air valve of the inner chamber.

Abstract: A dual air chamber structure having two independent and air impervious chambers, with each chamber being inflated and deflated by a separate air valve. The inner chamber, except for its air valve, is completely contained by the outer chamber and is comprised of primary horizontal conduit and a plurality of inflatable intermittent vertical posts made of small diameter tubing which are connected by a corresponding plurality of horizontal conduit made of small diameter tubing, such that the inner chamber as a whole is comprised of a repeating series of inflatable vertical posts followed by inflatable horizontal connectors. The outer chamber forms an air impervious bladder around the inner chamber, except for the air valve of the inner chamber.

Abstract: A dual air chamber structure having two independent and air impervious chambers, with each chamber being inflated and deflated by a separate air valve. The inner chamber, except for its air valve, is completely contained by the outer chamber and is comprised of primary horizontal conduit and a plurality of inflatable intermittent vertical posts made of small diameter tubing which are connected by a corresponding plurality of horizontal conduit made of small diameter tubing, such that the inner chamber as a whole is comprised of a repeating series of inflatable vertical posts followed by inflatable horizontal connectors. The outer chamber forms an air impervious bladder around the inner chamber, except for the air valve of the inner chamber.

Abstract: A garment is disclosed comprising a back panel, means for tensioning the back panel about a backpack, and a front panel. The tensioning means extends around a front portion of the back panel, along upper, lower, and side portions of the back panel. The tensioning means may be a drawstring. The front panel may have a hood, arm openings, and sleeves. The back panel forms a back chamber sized to fit over a backpack. The back chamber preferably has a maximum volume of greater than or equal to approximately 2 cubic feet. The back chamber also preferably has a depth of greater than or equal to approximately 8 inches, a width of greater than or equal to approximately 18 inches, and a height of greater than or equal to approximately 24 inches. In use, the back panel is placed over a backpack with the front panel positioned between the back panel and the backpack. The backpack is then placed on the user's back.

Abstract: A garment is disclosed comprising a back panel, means for tensioning the back panel about a backpack, and a front panel. The tensioning means extends around a front portion of the back panel, along upper, lower, and side portions of the back panel. The tensioning means may be a drawstring. The front panel may have a hood, arm openings, and sleeves. The back panel forms a back chamber sized to fit over a backpack. The back chamber preferably has a maximum volume of greater than or equal to approximately 2 cubic feet. The back chamber also preferably has a depth of greater than or equal to approximately 8 inches, a width of greater than or equal to approximately 18 inches, and a height of greater than or equal to approximately 24 inches. In use, the back panel is placed over a backpack with the front panel positioned between the back panel and the backpack. The backpack is then placed on the user's back.