Depends on specifics, but I tend to use one of a few:
Surefire EP4 is my primary, although sometimes a bit too muffled (unless I'm allll the way up next to the speakers =D)
Rooth C&P, specifically the M-Fit Concert/Party, have some great fidelity coming through. Sadly not quite sure where to find them other than through Drop (formerly MassDrop)
Advanced Eartune Live U Hi-Fidelity is new to me, just ordered them, but they look promising. Have a good sound curve (see website), and hopefully similar fidelity to the Rooth and as good or better dB reduction.
Sorry, Surefire, not Shure.
They have different sizes, I got medium. There's better options out there I'm sure, but again, on solo hunts I can hear ducks whistle behind me, quack from a fair distance, and I've gotten used to calling with them in. For $15 it's a good option.