LED Light Up Flashing Shoe laces w/ 3 Modes Nylon Material All shoelaces are made of a HIGH quality Nylon, with the LED lights inside the laces The laces have three different color options: Constantly On , Slow Flashing, and Fast Flashing 2 x CR2032 Batteries are INCLUDED and are REPLACEABLE: constant lighting for 30 hours; flash model for 60-80 hours These shoelaces are perfect for so many occasion From walking late at night, to going to a party, these shoe laces are sure to catch everyone's attention These laces are shipped within the USA