Thank you for your reply. I ruled out soft material like that because when my sister sits down,I see several inches of space between her butt and the back of the chair. It seems to be about 4". If I use 4 inches of soft material, it will compress to 1½ inches or less, and so she still has a bad situation. That's why I wanted upholstery material-it compresses a little, but not that much.
Thanks for the advice as to where that is available, though, I might well use it in addition to 3 or 4 inches of upholstery foam just to add a little extra softness.
Thanks for the advice as to where that is available, though, I might well use it in addition to 3 or 4 inches of upholstery foam just to add a little extra softness.