Abstract: A multiwall commodity bag comprising a sealed plastic tube having a longitudinal seam formed by overlapping margins sealed together by two spaced seals to provide a channel. The overlapping margins are formed with openings only at the opposite ends of the channel, one of the openings being formed in one of the overlapping tube margins at one end of the channel and providing communication between the interior of the tube and the channel to permit escape of air through the tube, another of the openings being formed in the other overlapping tube margin at the opposite end of the channel and providing communication between the interior of the channel and the exterior of the tube. The size and number of openings are such as to permit venting of the tube while inhibiting flow of commodity into the channel or admission of external contaminants into the channel.

Abstract: A multiwall cooler bag is formed by gusseted inner and outer tubes, the outer tube being made of kraft paper and having its lower end circumferentially bonded to the inner tube, the inner tube comprising an inner ply of plastic material heat sealed to closure at its lower end and an outer ply of kraft paper, with a strip of plastic reinforcing material extending the length of and secured to the back and front walls of the outer tube. The front wall of the outer tube has its lower end formed with a closure flap secured to the back wall of the outer tube, while the back wall of the outer tube has its upper end formed with a closure flap overlapping the front wall when the bag is completely closed. The upper portion of the inner tube is free of the outer tube to permit independent closing of the inner tube before closing the outer tube.