Help with ANR Headphones

In a previous article, "revdmv" said:
To add somthing new to this discussion, I would suggest looking into
one of the new lightweight passive headset designs. Either from
www.clarityaloft.com or the Lightflight from Lightspeed.

They both use an in ear foam seal to provide very good noise reduction(
claims to exceed ANR in some cases). I'm going from an old set of Bose
to the Clarity.

How often do you have to replace the foam seals? I use foam earplugs at
night because my wife is a heavy snorer, and the plugs are only good for a
couple of days before they won't squoosh (sorry to get technical there)
enough to get into my evidently narrower than normal ear canals.


--
Paul Tomblin http://xcski.com/blogs/pt/
"Mission Control clears SMS-1 to Canaveral via thrust vectors, Up, Hold
Earth, right turns, expect further clearance in ten days."
http://www.avweb.com/news/usedacft/181561-1.html