I hope so! Anybody know defintively? I looked on their website and couldn't find much detail about the products. I'm guessing that they are so popular that its taken for granted that they are OK. There are so many things we take for granted, I guess, and, in all honesty, we take far greater things for granted than coin storage...where do we start, would we have the time?I truly hope that 'fit-for-purpose' Mylar coin flips are something that they claim to be? I'm going to be SO pissed off if, in twenty years time, we find out that the adhesive leaches into the card and dies the rims of the coins red, or something? I've lovingly decontaminated my coins before sealing them...if I don't outdo the tomb-boys I'll be gutted!