Hello everyone, I joined in 2018 and usually stop by a couple times a day to see what is going on. This is my first post. I believe most do not line because it is hard to get right. Wallets bend in the middle and it is hard to not end up with wrinkles in the fold. The extra cost added also comes into play. I line every wallet I make because these days I believe a RFID blocker is necessary. If you add a RFID blocker you have to cover it up with a liner. Actually If I was a customer I would not own a wallet without a RFID blocker. I guess I am just paranoid and do not want to deal with identity theft.