nto the band body or the ink for the printed or debossed colorfilled style bracelet. The glow powder is eco as well as the silicone material bracelet. When absorbs enough strong light before being put in the dark, it glows blue, green or red depending on the style of the glow power. The glow will last for hours and gradually weaken. But when reabsorbs the light , it glows again like original shows. It is the most favorable item for the night event. It looks so good in the dark reflecting the logo custom. Hope this can help you for the glow in dark silicone bracelets. A uv silicone bracelet can transfer its color darker under sunshine when absorbing uv light. It is not only with good looking appearance but also indicating the strength of the uv index. So some uv silicone bracelets made as the indication with the ruler of levels of index. Wearing on the wrist to avoid long time staying under strong uv. So what makes it uv transfer ? The answer is the UV phosphor which use uv energy to open the sensitive molecularmental health awareness rubber bracelets bond and make it jump from low energy to high energy level. bracelet-en-silicone1-4-inch-silicone-bracelets s our rule. We are always strict in quality. It is easy to make a personalized wristband on our website. Select wristband style. The popular styles are debossed, embossed, colorfilled, printed and embossed printed. We shows all the featurmental health awareness rubber braceletse of each one in our category page. Select size. Regular sizes of a silicone wristband are 6”(150mm) for toddler, 7”(180mm) for youth, 8”(202mm) for adult in circumference and 1/4”(6mm), 1/2”(12mm), 3/4”(19mm), 1”(25mm) in width. We make it all together 2mm thickness. Select colors and quantity. Enter the message you need to put on the wristband. You are able to make the message front and back or continuous outside. For the inside, the message can be printed or embossed.