Telescopic covering

A retractable covering (10) for areas, such as tennis courts, swimming pools, vehicle or trailer bodies, sheds, and so on, which includes several substantially identical covering elements (12), equipped with rollers or in any case with movable support means on two opposite sides, and pairs of parallel runways along two opposite sides. The front and back rollers of each covering element are laterally offset, and the rails have end portions deflected upwards or downwards, and parallel to each other. The covering elements are movable from an extended position, in which they cover the area and may be sealed together two by two, to a retracted position in which they overlap each other at least partially and occupy an extremely reduced space, and viceversa.