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 answer 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. It become a uv silicone bracelet when the UV phosphor is put into the silicone mass and produce it a band. where-to-buy-colored-wristbandsbuy-wristbands-online 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 lightthick rubber wristbands 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. Sucthick rubber wristbandsh 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.