Abstract: This invention relates to a portable self-supporting collapsible shelter having a supporting frame; a cover comprising a tent enclosure when erected and supported by the frame having at least two side walls spaced from each other at the same ends by a rear wall, a top wall (or roof) and a front wall; the cover having at least one continuous opening directed across one first wall and at least partially across two other walls spaced from each other at the same ends by the one first wall, in use said at least one continuous opening being closed and opened by at least one continuous closure mechanism being disengageable so as to open the at least one continuous opening and being engageable so as to close the at least one continuous opening, enclosing an article traversing the at least one continuous opening.