I hate these earplug style ones that block the canal and make you feel like you have a head cold, just before you get hit by a car because you can’t hear a damn thing. The flat ones just fall out and sound tinny because they don’t sit in the right spot.
These are the best i’ve owned*…
They sit just perfect (not too far in, not too far out), snug without being uncomfortable. I’m still using a pair but long since discontinued so once they’re gone they’re gone. 
*Sony MDR-ED21LP for those interested.
