I generally double up for rifle shooting, plugs and muffs.
I bought a vial of the howard leight foamies, they look kinda bullet/peanut shaped and have been using the same pair for months for cutting my lawn.
haven't really found a plastic/rubber set of earplugs yet that don't irritate my ears some just due to fitment issues.
These work good for me. I double up with muffs on indoor ranges just because I have a bad ear that hurts otherwise.