Abstract: A bag formed from a single sheet of flexible material having two ends and two edges folded parallel to the ends to provide front and back surfaces that are sealed together along the edges to provide a pocket. Each of the surfaces extends toward an opening into the pocket through which articles for support may pass and from which articles may be removed. One of the surfaces extends beyond the opening of the pocket and is folded over the end of the other surface. The end of the folded over surface is positioned directly below the end of the other surface outside of the bag and elastic members are held captive within the ends whereby by stretching the bag in the direction of the sealed edges and maintaining the bag in a stretched condition a plurality of closure seals are formed to close the opening to the bag. In addition, when the bag is joined sealed edge to sealed edge and stretched around a form, the stretched ends of the bag that form the opening to the bag also support the bag around the form.