Essential Equipment Mar del Plata
Essential equipment: day/beach bag with a opening that closes when you pull the cords (which makes it turn into a backpack).
I've been carrying this for the better part of a year, picked up in an Old Navy in Puerto Rico. I've seen locals in every country use them. Cheap, doesn't draw attention, conceals contents, and keeps hands out. This one has a side pocket to store smaller, less important things.