The present invention is directed to an enclosure for protecting a cable connection. The enclosure includes an unsupported sheet sealing member contained within an inner shell and an exoskeleton. The inner shell defines a central axis for the enclosure. The sheet sealing member is attached along two longitudinal edges of the inner shell and wherein the rigid exoskeleton is configured to snap onto the inner shell in a direction transverse to the central axis to secure the enclosure around the cable connection.