1.blue glowing led shoelaces 2.Nylon or High light-guide ... easy to change the battery.♥ Product Name: Party nolvety Flashing LED Shoelace ♥ Item No.: YZG-BI Series ♥ Material available ... color available: Red, Green, Yellow, Blue, Black, Pink,Orange etc. ♥ Led color available: Red, Green, Yellow, Blue, Black, Pink,Orange etc. ♥ Flashing ... children or any one who like sports. blue glowing led shoelaces