I ordered some beautiful pure linen old mangle cloth to re-upholster this chair with. Mangles were used to press water out of clothing when washed. The red stripes on either side are meant to be guide marks for loading the items into the mangle. This is wonderful strong fabric, but not used as much as other vintage linens for upholstering, probably because the placement of the stripes usually means that they won't be on the cushions.

http://thecottagemarket.com/2017/09/morning-cup-joe-47.html
https://www.myrepurposedlife.com/talk-of-the-town-88/
http://theessenceofhome.blogspot.com/2017/09/share-your-style-party-134.html#more