20 so that an elongated hinge rod 28 can be inserted through the aligned openings of the interengaged conduits thereby to effectively hingedly attach the slats 20 together in a now apparent manner the hinge rod 28 would be of a lightweight metal construction so as to impart strength to the slats 20 and wheels 30 32 would be threadably attached to opposed ends of the hinge rod 28 so as to provide a mobility to the cover 12 as it is pulled along the edges of a swimming pool in the preferred embodiment 10 the slats 20 could be formed of a flexible reinforced plastic again to hold the accumulative weight down and the hinge rods 28 then provide a strengthening reinforcement so that the cover could support the weight of an adult who might accidentally fall onto the cover while it is positioned over the surface of a swimming pool the wheels 30 32 would travel along the supporting edge of the pool and in the case of a specially designed pool the wheels could be operably retained within a receiving groove along the edge of the pool to further add support to the cover in the event of a child or adult falling thereon a free end 34 of the flexible pool cover 12 is provided with a plurality of reinforced loop straps 36 these loops may be engaged by a hook 38 attached to an elongated pole 40 and a user may employ the pole to pull the cover 12 off of the elongated roller 14 so as to effectively cover the surface of the swimming pool once the cover 12.