Doc who did my disc surgery said the worst thing we do is sit on a wallet. I've used one of these to carry my license and credit cards since the 80's. Money folded over inside this and carried in front pocket
wallet in back pocket caused me back pain. Wallet in breast pocket caused sore man nipples. Wallet in jacket was always forgotten at home. Wallet in dustbin caused me to save lots of money by leaving unneeded credit cards at home.