Subject: Been using them for about 20 yrs... ... and, no kidding... I have my original pair... However, I no longer use them only because the plastic lenes have yellowed and my prediction is the snap on the side will be very prittle and most likely break... so, I just hang on to them for old times sake.
ALL the parts are replaceable... so, a pair will last me at least 4-5 yrs.
They are comfortable... .however, if you leave them in your car and allow them to get to an extremely high temperatre, the seal will deform and you need to heat them up again to get the foam to reshape.
Once the foam forms to your head they are good... until then, they may be leaky... use a little vaseline around the gasket edge and they seal perfectly. And, yes they do what they avertize... help alleviate pressure.
FWIW Joe Moya Edited by Joe M 2005-02-18 10:29 PM
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