rk silicone bracelet is made by the same technology with the normal bracelet but adding the glow powder . The powder can be added into 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 molecular bond and make it jump from low energy to high energy level. bracelet-en-silicone1-4-inch-silicone-bracelets friendly material, so it is harmless to kids healt. Since we make it high quality silicone which is soft to wear, kids will love our it much. The product of figured shape, glowing and UV transfer and anti-mosquito is very make your own rubber wristbandpopular. We can make it figured shape for the logo, like a watch, heart or basketball which has larger size on the wristband, so it will be outstanding and clearer. A glowing wristband glows in the dark with green or blue magicly. The glow last for a bout 3h and it needs to absorb light enery from sun or lamp light before glowing. The kids must like it and be bursting with curiosity. It is good for night event. UV wristband will tranfer its color from transparent to blue or purple. It indicates the strength of UV index. The color will be darker if sunshine stronger. It is good for outdoor ativities like football, bmake your own rubber wristbandasketball and camping. We add some herbaceous oil into the silicone, then it become an anti-mosquito wristband. It can help avoid the attack of mosquito outdoor.