If you are having problems with foam earplugs not fitting properly I would suggest investing in custom fitted musicians earplugs - my ear canals are twisty and narrow and most foam earplugs were too big and uncomfortable.

Musicians earplugs are made to fit your ear perfectly, they have filters which can be changed depending on how much sound you want to let in and I wear them constantly now when I am out and about - cost was around 200 dollars.

Foam concert earplugs also worked for me when I could find them. /they seemed to be a softer foam and easier to insert and never felt uncomfortable.