Ive always found ear plugs to be the most effective at reducing sound.
They are also a lot more comfortable and dont interfere with your natural head position when shooting long guns.
“The enemy is anybody who's going to get you killed, no matter which side he is on.” ― Joseph Heller, Catch-22
Beware of associating with "Cheap" Squirrels. They tend to be very narrow minded, hypocritical, and will gag you if you question or disagree.