I have the standard Ety's, but fwiw, I find the blue plastic ones you can get at any drugstore/shopping center work just as well, and are 1/2 the pirce ($8-9 bucks). Plus, you can get them localaly. they are sold as ones to use on planes for pressure changes. they work very well for concerts too, and are 15db atten. i find 20db too much.