I decided to try the 'slim' comply P tips, since the medium where still a little uncomfortable after a while. Finally a comfortable fit with the best sound possible. With these tips they almost disappear (in sight and comfort).
slim comply P's, wearing down, using the shirt clip, a little EQ- finally satisfaction.
Yeah, the slim comply P is something that I think will fit most people and give them good fit with the er4 even though initially they might consider going for the "standard" medium size. Definitely my favorite foam tips for the ety even though there was time when I used only shure olives. Oh, and props for the Halestorm video - big fan.