Abstract: A portable outdoor enclosure protects occupants from at least some elements of nature and includes a wall panel forming an outer wall of the enclosure. The wall panel has an opening formed of sufficient size to allow an air conditioning unit to be inserted through the opening in the flexible material wall panel. A sleeve of flexible material is connected to the wall panel and extends in at least one of an inwardly direction and an outwardly direction. The sleeve includes at least one outer peripheral end spaced from the side wall capable of being snugly engaged with an external surface of an air conditioning unit to be installed through the sleeve. At least one flap can be provided for covering the opening through the wall panel when the air conditioning unit is not installed.