Abstract: A composite sheet comprises a textile component having a first surface and a second surface and a first polymeric coating on the first surface of the textile component wherein the textile component further comprises at least one woven fabric of continuous filament yarns, the fabric having an areal weight of from about 70 to about 508 gsm, and a nonwoven fabric comprising a blend of discontinuous fibers of oxidized polyacrylonitrile fibers and silica fibers wherein the oxidized polyacrylonitrile fibers are present in an amount of from about 30 to about 70 weight percent of the combined weight of the oxidized polyacrylonitrile fibers and silica fibers and, optionally, wherein the nonwoven fabric is mechanically attached to woven fabric.