I have a pair of those Howard Leight and they are great. Only thing I do not like is it gets hot as hell in the dove field.
I have bought and tried a lot of ear protection but my favorite kind for bird hunting is the Alpine work safe ear buds
Link Here They are awesome, I have used other passive ear buds like surfire and the pelator combats, but the Alpines are a clear winner. The only thing I have a tough time with is hearing people shouting across the field, otherwise I can hear pretty much everything and my ears aren't ringing at the end of the day.
The Allen company light ear protection are the best I have every worn. The only problem is you look dumb as hell wearing them... But seriously, try them and you will be amazed how well they work.
Link Here