Husbandy complained his slippers looked like “hospital slippers for people who are ill”. He’s not naturally a grey coloured person – I think that’s what he meant, in his own way.
Meanwhile I saw a double sided washing mitt, in the local chemist. It was conveniently curved at the top, and with Avengers characters too!
I unpicked the mitt, re-hemmed it, and stitched it onto the slipper tops.
Tada! Much better!