Abstract: A flexible bag material made of plastic material for the packaging of dry food products such as cereals wherein the plastic material is a multilayer film. The multilayer film comprises at least one high moisture barrier layer made of HDPE, a moderate oxygen barrier layer made of a blend of amorphous polyethylene terephthalate (PETG) and PE having a oxygen permeability of 400 cm3/m2/day or higher when measured at 23° C. and 0% relative humidity, and a peelable sealing layer. The flexible bag material is especially suitable for manufacturing an inner bag of a bag-in-box package having an outer rigid box made of cardboard, in particular recycled cardboard.