Roughly made depression era bedding piece together from cotton flour sacks of various types and sizes. This is a comforter cover or feather tick cover (for the outside of a cotton ticking 'mattress' filled with feathers). Measures about 58" wide x 72" long.
There's some great 20s - 30s vintage advertising here, though many of the sacks are plain, or mostly plain with the printing bleached out. This has lots of spotting and discoloration from age and use, which adds character and authenticity to it, really.