I used to keep my wallet in my back rear pocket until about 15 years ago. It was a fabric wallet made out of hemp with Velcro clasp and I would fill it so full of money and cards and receipts and other junk that it would bulge outward, even though the seams held, and it caused me a lot of back pain because of its size and where I kept it. Before that, up until the late 1990s, I had the typical leather billfold that had pockets for cards and cash and those plastic sleeves for holding photos. It was bulky and bulging and did the same thing. It wore out fast too.

Around 2010 or so, I switched to a much thinner and lighter Chums wallet (like this one) that I use to this day. I rarely carry cash or coins on me anymore, my photos are all in my phone, and I keep only a few necessary credit and ID cards on me. I also have kept my wallet in a front pocket since then and it has immensely helped relieve the back pain that wallets in my rear pocket gave me. The one I have had since then continues to hold up well, but if I ever need to replace it, I'm sure I would get one just like it.