Bosmere Waterproof Bird Bath Cover for 18" to 21" Diameter Bowl, Green Made from PVC-backed polyester, UV-stabilized against the sun Provides full winter protection for your fountain or statue Wipe clean surfaces 100% waterproof Made from PVC-backed polyester, UV-stabilized against the sun Provides full winter protection for your fountain or statue Wipe clean surfaces 100-percent waterproof