That is what it is Advance! Thanks for the info..... I've always wondered if, even if you take extremely good care of your contacts, could you wear them longer -- but, still it matters on how the "contact" was designed. It is good info because really, I like to try to make them last for as long as I can but, I don't want to gamble with my eyes. I want to check into the Acuvue Advance and purchase them. Where could I find the most cost efficient for a box per eye?