There is a company in Boulder Co. (sorry I don’t have the name right here) They custom make earplugs and they also set them up with some real high quality headphones that will work with any music machine that uses 3.5mm (mini stereo) plug. I expect there are a couple of good companies out there that do the same. I also use the inexpensive foam plugs. You should throw those away every couple of uses or clean them up after every use. This will save you a nasty ear infection.