With 8 x 2" hard spikes, they have 6 lighting displays options, from flashing to blinking to twinkling to strobe to on / off, in bright LED blue, red and green lights
They also rotate through 90 degrees so can be worn either across the head or from front to back.
They are fitted with replaceable batteries.
GO ON - WEAR THEM AND STAND OUT FROM THE CROWD ....... !!