A packaged wound dressing comprising an elongated, absorbent cavity wound dressing that is packaged in contact with two opposed sheets of microorganism-impermeable plastic sheet material, wherein the opposed sheets contact the dressing to form a microorganism-impermeable barrier around the circumference of the dressing in at least a region of the dressing. The invention also provides a method of making such a wound dressing comprising the steps of: providing an elongated microorganism-impermeable plastic sheet; providing one or more mold cavities in said elongated sheet for molding an elongated wound dressing; introducing a fluid precursor of a solid wound dressing material into said one or more mold cavities; and allowing said fluid precursor to set in said plurality of mold cavities.