n and no side effects on body. Silicone bracelet has certain care function while some functional materials such as negative ions added into the bracelets A glow in dark silicone wristband 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 wristband. 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 wristband 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 abest fitness wristband uknswer is the UV phosphor which usd uv energy to open the sensitive molecular bond and make it jump from low energy to high energy level There will be a change from visible light to visible light, resulting in the changing color from light to dark. best fitness wristband uk Glow in dark silicone wristband is popular for night event. We add luminous powder into the wristband so it glows. A glow in dark silicone wristband can glow green or blue after absorbing strong light energy. We need to take it under the sunshine or lamp light for about half hour. Then it glows strongly in the dark. The glow will fade gradually in about 3h. It is the best one for night event. Such music show, night walk and so on. If you want the glow stronger, the wristband color need to be weaker. Because it is easier to absorb and release glowing. We have 7 colors for it now. 293c for blue, 802c for green, 803c for yellow, 804cfor orange, 179c for red, 196c for pink and 2655c for purple. The logo can be debossed, embossed or printed on the glowing wristbands.