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 little rubber band braceletsphosphor 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 n it to be inspired. Now there are different size , different material and different logo stylle wristbands. What will the rubber bracelet be in the future? I think the most imagining is the material . We can creat the more comfortable , eco or healther material to act upon the body. Or we can almost get it that a rubber bracelet will be digital with the tenology like iwatch. If running is your hobby , you should have a digital rubber wristband. A sport digital rubber wristband is a digital chip putting in the rubber band part. The biggest advantage of the digital rubber wirstband for sports is the high step counting accuracy , more stability of 50 meters waterproof , the long life time built-in battery and also comfortable and durable as it is the silicone madelittle rubber band bracelets material. A sport digital rubber wristband is the assistant of good health to remind you of sporting.