I hate to carry a purse but can never find a wallet small enough to fit in a pocket yet carry what all I need. This is my compromise. I can fit everything I need, even my cell phone if I want. However the first week, I left it behind when shopping, to my great distress. So I attached my key ring to the the zipper (that stays there always) as well as a small carrier for my earbuds and haven't had a problem with it since. I can't test the RFID blocking.