Abstract: An open mouthed bag of flexible, preferably waterproof material having a pair of mating elongated fastener strips secured to the opposite inner surfaces thereof adjacent the open mouth for a complete sealing of the bag. A second pair of elongated mating fastener strips are utilized with one of these strips secured to the outer surface of the bag, generally adjacent the mouth thereof, and with the associated second strip releasably lockable with the first strip at all points of engagement therewith along the length thereof whereby a support member can be positioned between the first and second strips and the strips locked to each other about the support member for a mounting of the bag thereon.