This product glows in the dark. This premium 22-inch assorted glow stick is in the shape of a slim tube with a connector to join the two ends and fix them into a round necklace shape. They are of a standard size and can fit anyone without any hassles. The inside tube comprises of non-toxic and non-flammable chemicals which can be washed off easily if they spill on your hand by chance. You just have to shake the product to emit light. Once activated, they can emit light up to eight to twelve hours before fading away. This product is safe and can be used by kids. They are mostly acquired in bulk for parties, events, occasions, and birthdays as an element of fun.