This is a very useful piece. I made several of these and sold them when I was first quilting. Mine were not exactly like this but the idea was the same. I did not take pictures in those days.
This blog describes how to make your own sew slip rectangle for your sewing machine. I bought one at the Houston 3 years ago , I know there are two different clmpanies who make these pieces but I can't recall which one I bought . It never worked for me , kept getting caught up in the quilt and not sticking to the machine. I was very disappointed. It would be cheaper to try one that you make yourself to see if it works. So here is the blog that tells you how to do that.
Weather Report. It rained like crazy all day, a very heavy rain.
Kind of chilly .