I have used Ikea origami fabric and fake fur fabric (for protection). The bottom part is the back of the fake fur, which looks a bit messy, but I like it. You can use any kind of fabric you like, as long as you also use a sturdy fabric for protection. When using fake fur, remember that the fur takes up quite some space as well, so make your sleeve a bit bigger when using fake fur.
This tartan sleeve is made from an old scarf and a scrap of leftover fabric (lined with the fake fur again).
Hopefully, the lovely J.W. Anderson for Topshop hard case/ DIY sleeve combination will keep the Ipad safe.
Thanks a bunch for having a look!