An end-sealed packaging bag comprising a multilayer non-heat shrinkable film and an easy open lap seal is provided. The film comprises at least four layers, including an inner heat sealing layer, a contaminated layer, a barrier layer, and an outer heat sealing layer. The film, when formed into a bag, is defined by a front panel, and opposing back panel connected to one another by a pair of side gusset panels. The bag further comprises a peelable lap seal connecting the inner heat sealing layer to the outer heat sealing layer of the film. The bag further comprises a first end seal connecting the inner heat sealing layer on the front panel with the inner heat sealing layer on the back panel between the side gusset panels and proximate to the first end of the bag.