I absolutely LOVE my Koss "Sparkplug" earbuds. I use them
almost all the time with my ultralights. They are different
in design from all the other earbuds that I've seen because
they don't have anything that hangs down from your ear. They
fit completely into your ear canal and, in my case, actually
stay put better and have a noise-cancelling effect.

Here is the URL for them on the Koss web page ...

http://www.koss.com/koss/kossweb.nsf/p?openform&pc%5Eeb%5Esparkplug

I bought mine at my local Radio Shack store for less than $20 USD.

73,

Steve N5WBI
Houston TX