We've got the perfect one! It's really easy to make too: https://www.frugalfamilytimes.com/2018/07/how-to-reuse-old-jeans-to-make-denim-quilt.html
Here's how to make a Denim quilt
You could cut out large sections and quilt them together, but that would be a lot of work!
Here's another waterproof version:
What a cool idea!
What a good idea! Check this one out:
I want to make some toilet and bathroom floor mats from old blankets.
How to make dog toys from old blue jeans?