The shoelaces are made of soft nylon with 120cm total length, which is flexible, durable, and very easy to tie 3 Fashionable Modes: Fast Flash, Slow Flash, Continuous Light, Perfect for parties, night activities, safety and all kinds of night life fun. Beautiful High Visibility Neon Lights shoelaces are available in five different colors: Blue, Green, Pink, Red, YellowOrange Boost your visibility with flashing LED lights: You can be seen by drivers in peripheral vision with this Led shoelace. Lights up shoelaces make you safer night outdoor activities. Batteries Included: The CR2032 Battery will give about 30 hours for continuously glowing, 60-80 hours flashing lights. And the battery is replaceable.