Abstract: A layered material such as a packaging laminate for a packaging container possessing superior oxygen gas and aroma barrier properties. The packaging laminate comprises a first laminate unit and a second laminate unit which are bonded together by the intermediary of an interjacent layer of an adhesive. The first laminate unit has a rigid, but foldable core layer and outer, surrounding layers of thermoplastic, and the second laminate unit has a flexible substrate or carrier layer of thermoplastic which, on its surface, carries a layer acting as an oxygen gas and aroma barrier and consisting of a silicon oxide deposited by chemical plasma deposition and having the general chemical formula SiO.sub.x, in which x may vary within the range of between 1.5 and 2.2. A flexible laminate having a SiO.sub.x barrier layer is also disclosed.