While shooting: muffs and foam plugs together. During cease fire times I remove the muffs and leave in the plugs. The public range I use has a very loud PA system - it is loud in order to be heard over gunfire. However during the cease fire period the PA is almost painfully loud. So during cease fire I remove the muffs to hear any range officer commands but leave in the plugs to protect my ears from the PA system.

And yea those muzzle breaks are freakin' loud!