You only get so many weekends, you only get so many summers. This seems like one of the best ones of both.

I have used a similar eaarplug at every concert I've been to for the last four years or so, and they're very good. If you go on a regular basis, you may need to replace the earplugs - they can get pretty grotty in multiple gig environments :P

I like to use the Etymotic ones, they're a different design, but they make concerts so much more enjoyable. An essential!