The entire, self-contained slide pack is approximately 3 ft (0.91 m) wide, 2.5 ft (0.76 m) long and about 1 ft (0.30 m) high, depending on aircraft type. In the center, forward part of the pack, a multi-layered piece of heavy urethane or neoprene/nylon fabric, called the girt, is left hanging out to a length of about 2 ft (0.61 m). When installed in the aircraft, a girt bar is put through the center, outside end of the girt and attached to the interior floor, just inside and in front of the exit door.