Infinity Scarf 2.0
These are approximately 9"x28" that slide easily over your head and rest comfortably around your neck without all the bulk of a traditional infinity scarf.
They feature a hidden pocket lined with a light weight fabric so you don't feel the bulk of extra material. You won't even know a pocket is there.
The pocket is the perfect size to hold your ID, debit/credit card and some cash when you don't need/want to carry a wallet.