[wddkcs]

Just a wallet on a lanyard to hang around your neck, assuming it's like ones I've seen. I've seen used in less safe countries to avoid pickpockets, not sure if there's other reasons. The benefits of a fanny pack without the style.

[eternityforest]

They're also much harder to just randomly leave behind, especially if you mostly never actually need them because you just pay with your watch or phone

[Obscurity4340]

Actually genius