No, they are just plastic wallets/sleeves to put proof cards in, not wafer thin ones, they are a bit more sturdy for protecting proof cards. I think they may only be available in the US.
They are called top loaders Andy you can get them off of ebay.com
They even do larger sized ones for oversized proofs / cromalins
Here are some 6x9's which would be the size for proofs http://cgi.ebay.com/TOPLOADERS-6-X-9-NEW-PACKAGE-OF-10-ULTRA-PRO-WHOLESALE_W0QQitemZ120510568146QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item1c0efd56d2#ht_536wt_1165
This is a thread which shows the way Bryan stores his cardbacks using top loaders