One item with LED (light emitting diode) ) is used to warn people to pay attention. reflective material can reflect light in the daytime, LED can be flashed at night. Another item without LED .Fluorescent fabric and reflecting tape are high visibility . When pets wear it so that pets are clearly visible to motorists, drivers, cyslists and so on at night or dark Specifications : 1) Color: Fluorescent yellow ,Orange-red . 2) Fabric: 100% polyester 3) Reflective tape : Made in China or 3M USA 4) Sizes: S,M.L.XXL 5)Packing:1pc/polybag ,100pcs/ctn . 6)Carton dimension:30*32*36cm 7)G.W.:12KGS N.W.:10KGS