E-A-R Classic Soft UF Foam Ear Plugs Corded (NRR 31) (Box of 200 Pairs)J. HiltonNovember 3, 2012Absolutely recommend these earplugs! Been using them for years. I teach audio courses at a local college and endorse the use of these to colleagues and students, handing them out free by the dozens every semester. Remember that to get the full isolation you need to insert them well into the ear canal (but not so far as to be touching the eardrum). They work as well as full scale ear muffs when worn properly. I use them in the shop, when playing out on stage if the monitors are too loud, flying, mowing, and even to block out my wife's snoring, bless her fuzzy heart . . . I joke that they fit perfectly up nostrils when student productions aren't all that good . . .