At my church we are all are on IEM's. We just got some shure es315's for the bass players and drummers. I live the sound but I find that the foam for the buds I am using doesn't isolate very well and I find myself being overpowered by the drums behind me even when they aren't in my mix. I need some recommendations for better foam/rubber buds or whatever they are called, for better isolation and comfortable. I don't know any of the types or what I am using now, but I think it's rubberized, and the diameter doesn't seem large enough to fully plug my ear, but when I press with my fingers to fully isolate the mix sounds way better. Any help is appreciated.