Abstract: A moisture barrier bag for containing semiconductor wafers. The bag includes at least one opaque panel made of moisture barrier material, and at least one window panel made of at least partially transparent material. The window panel is joined in sealing relation to the opaque panel. The opaque panel and window panel are capable of defining a volume for receiving semiconductor wafers therein. The window panel permits optical inspection of semiconductor wafers received within the volume. The moisture barrier material has a moisture transmission rate which is sufficiently small to permit storage of semiconductor wafers within the volume for an extended period of time without damaging the wafers by moisture attack.