I found mine at a local retail store near all eyeglass/foot care/canes/medical area. I use them first time flying. Warning:do not shove them too far down your ear canal due to nervousness.(first time flyer) Haha, i found out the hard way that it hurts. When the cabin pressure pushes on them, it takes some time for those lil filters to "equal" out the air... so there is no pulling them out for awhile. Also once you land.. leave them for a good while once you exit the plane. I waited 5 mins.. grabbed one and just *poped* it out.. :::

uch::::

That caused me irritation, so Im not sure if they worked well for me or not do to my misuse. LOL