ABOUT OUR BEAN BAG COVERS: Built-to-last twill covers have reinforced seams to prevent rip-outs. And they're machine washable, so there's no need to worry about spills and smudges. Durably chainstitched full-length back zipper allows easy removal of the insert for cleaning. 100% cotton. Imported. ABOUT OUR INSERTS: The new insert shell is 100% polypropylene. This allows the shell to be much thinner and lighter than the former cotton shell. (Yes, it’s thin enough to be translucent, but that’s the beauty of this fabric: it doesn’t need to be heavy to be dependably tough.) When it comes to innovation we didn’t stop there; the fill is recycled polyester beads in a rectangular shell; and unlike previous inserts that shared the shape of the cover, this shape doesn’t allow the beads to crush down with use. Instead, they move and readjust each time the chair's used, to maintain lofty, cushioning support.