This is my Blue Foam Roll mod.
The length is from the the filter to just past the the metal band.
I made this one a little wider than the width of the eGo.
This is thick enough to stay in place.
Studio 35 Beauty.Compact Tweezers | Walgreens
You can push the foam down and pull it back up, it stays rolled.
Watch around the airways for gaps. It needs to be sealed all around.
Link for blue foam. Marineland Rite-Size U Bonded Foam Sleeve Aquarium Filter Sleeves

The length is from the the filter to just past the the metal band.
I made this one a little wider than the width of the eGo.
This is thick enough to stay in place.

Studio 35 Beauty.Compact Tweezers | Walgreens
You can push the foam down and pull it back up, it stays rolled.
Watch around the airways for gaps. It needs to be sealed all around.
Link for blue foam. Marineland Rite-Size U Bonded Foam Sleeve Aquarium Filter Sleeves