Abstract: A bag structure includes an upper resealable zipper strip positioned adjacent a top wall portion of an upper edge of the bag, with the top wall portion fixedly containing a vent tube therewithin. The vent tube includes a central tube web in alignment with the top wall, and includes a central aperture therethrough mounting a valve member therewithin. The valve member is operative to release pressure from interiorly of the bag body and is biased to a closed position to maintain contents within the bag body in a sealed relationship.