Originally Posted by
brancher
No adhesive (I wanted to be able to remove the felt for cleaning or other uses). I found that 1/4" carbon felt stretches much more than you'd expect, but doesn't have the elasticity to go back to original size. I first sewed it so it was a very slightly snug fit on the 10cm, but it became very very loose with no handling. So I ended up pulling and stretching as tight as I could - twice - and sewed it up that way to keep it snug.
So far it's working. If it loosens up too much next time out, I'll try something else - but I like the felt. It stays slightly warm with hot liquid, easy to nest, and makes for a very quiet kit when it's packed up in 'deluxe' mode (taking both Imusas instead of just 1).