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. &ncustom silicone bracelets cheapbsp; where-to-buy-colored-wristbandsbuy-wristbands-online icone bracelets are used in all kinds of entertainment venues and stadiums . They can be used as gifts, souvenirs, promotional products , etc . They are hot fashion ornament . They are also a kind of low-cost , high-efficiency advertising promotional gifts. Most of the silicone bracelets have no practical use . They are just fashion accessories . The words or expressions on the silicone bracelets usualcustom silicone bracelets cheaply reflect the beliefs and values of the wearer . When we wear silicone bracelets for a long time, they get dirty . How to Clean silicone wristband ? There are some ways . 1.Clean water . After the ssilicone bracelet becomes dirty , the simplest and most effective way is to rinse it with clean water . 2.Toothpaste . If the silicone hand ring is accidentally stained or greasy , it can be washed with a wet toothbrush dipped in toothpaste , then rinsed with clean water , and then wiped with napkins or soft cloth . 3.Bath lotion and laundry detergent: Apply the liquid to the place directly where it needs to be cleaned, then rinse it off with clean water after full friction .