They are shoelaces but not normal ones, because they could light up and flash! Ultra bright and eye-catching. Durable, waterproof and washable optical fiber as material. Suitable for almost all shoes with shoelaces, such as board shoes, roller skates, sneakers, etc. Let you stand out in party, KTV, bar, prom, dance. Especially ideal for night. How to Use: Install 1x button cell battery into each control box (battery not included). Lace up your shoes with these 2 shoelaces. Push the control button in turn to control the lights: on/flash/strobe/off. Light up Shoelaces Only! Shoes are not included.