20-inch Round Buckskin Fringed Native American Unknown Object Regalia? Cushion?

This buckskin object was in an estate box and I have no idea to its identity. It's 20-inches across and has an 8-inch opening in back. It's in excellent condition, looks hand stitched. Some of the fringe is crinkled from storage, but all there and great shape. The white (looks like thin cord) stitching on top in good shape. This would make a lovely chair cushion or pillow, but maybe it's something more meaningful. No idea. THANKS!