Sound the Alarm by Revival Republic
So you need to get your message out and, really, it just can’t wait? We have the solution here. Clamp a loudspeaker to your handlebars and (((Sound the Alarm!))). The original idea goes back as far as in 1939 London to warn the public against aerial gas attacks during the war. No worries if you don’t have a gas mask and respirator handy… you can always just wear the shirt from Revival Republic.