Abstract: A bag construction is provided. In the preferred embodiment, the bag construction or arrangement comprises first and second side panels, and first and second edge gusset members. The gusset members are peelable from between the side panels; peeling being facilitated by positioning of end tab extensions at both ends of each gusset member. In a preferred embodiment, both side gusset members comprise a gas-permeable material of sufficient density to act as a contaminant filter, so that contents within the bag arrangement can be sterilized by a gas sterilization procedure.