[jchcollins]

I think the Mylar thing for the garden variety collector is largely unnecessary. Yes, it is the most "inert" material, but realize that the HOF uses Mylar because they need the cards in their collection to last for hundreds / thousands of years more, not just the next 50-75. I mean I enjoy the idea of my collection outliving me and serving generations to come, but in reality I'm going to be fertilizer in all likelihood 50 years from now - so why do I really care? Polypropylene products and the other stuff that penny sleeves, toploaders, Card Savers, and One Touches are made of is also "inert" and "archival", even if they don't pass the same rigorous tests that Mylar does. The one time I tried to use Mylar, I found it very rigid and difficult - and I will agree with the previous poster who said it doesn't work well with toploaders. My cards looked great when finally IN the Mylar, but good luck getting them in or back out. Not for me.