A bandana is always great to have on hand: crying kid, smudged screen, running nose, impromptu picnic, minor injury, dirty hands, spur-of-the-moment ascot, empty chest pocket... In short, there's a reason people have been carrying handkerchiefs around for the last several centuries. Whether you're employing it for function or fashion (or both,) this one's cheerful enough to live in the back pocket of your jeans when not in use. It's made of printed cotton poplin from Liberty Fabrics in their Piccadilly quality that's both fine and durable.
