Maybe Trampoline cover? (NE side of Lombard)

I don’t know for sure what this is, or where I got it but I don’t need it. 14’8” across, has 8 clip connectors, middle vent is 12” square and a mesh material. Bag is 28” wide and 32” long. Might be a trampoline cover for when not in use, not sure but it’s free. First pic is topside, second pic shows backside.