A protective case for an electronic device may include a housing, a case cover and a gasket positioned between the housing and the case cover. The housing may include a case member, having a plurality of housing snap attachment structures formed therein. The case cover may likewise include case cover snap attachment structures formed thereon that couple with the housing snap fit structures. The gasket is positioned between planar surfaces of the case member and case cover so that it is axially compressed between the case member and the case cover to provide a water and air tight seal, with the compression of the gasket being maintained by the connection of the housing snap attachment structures and the case cover snap attachment structures.