Heel guard for slippers. Keeps them from falling off and keeps them from walking ahead of you.

I bought slippers from L.L. Bean and when I'd walk they would slide off my feet and walk ahed of me.. So I designed a heel guard that raises the back of the heel enough to keep the from walking ahead me andstaay on my feet. Use TPU - 95A because it's soft it works well. Glue them in the slippers using something like Locktite fabric and plastic glue. The rolled one should work the best