My Alpine ear defenders arrived, and they look pretty good - sturdy but possibly not bulletproof I'd say - and very comfortable over the relatively short time I've worn them.
Difficult to say just how much defendering they do without using them at a practice, which will happen on Wednesday, but Mrs. Pook's loud clapping and shouting next to my head seemed to be nicely attenuated.
One factor I'd not accounted for us that wearing glasses does allow a bit more sound in, so ear plugs have that as an advantage, but the proof of the pounding is in the beating, so I'll report back after Wednesday's rehearsal.