as negative ions added into the bracelets A glow in dark 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, greenwaterproof medical id bracelets 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 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. usb-wristband-wholesaleunder-armour-silicone-wristbands romotional gifts, Awareness, Corporate Trade Shows, Political Campaigning or Memorials.A wristband around the wrist can remind people of what it says. We make all the designs for free. If you need to put your logo on wristband, JPG, PDF or AI file is appreciated. Our designer is skilled to transfer it into the digital proof. We will make it to your satisfaction. All we do for designing is free no matter you place the order or not. Besides we can send you photo physical sample before mass production if necessary. Regular sizes of a silicone wristband are 6”(150mm) for toddler, 7”(180mm) for youth, 8”(202mm) for adult in circumference and 1/4”(6mm), 1/2”(12mm), 3/4”(19mm), 1”(25mm) in width. We make it all together 2mm thickness. Regarding with the circumference, it is the most important factor to choose size in our order. It is the average sizes for toddler, youth and adult. The direct way to choose size is to measure the size of your wrist before selecting. We are always strict in quality of our product focusing on edge cutting, polluted mark and printed logo to make a best product for you. ory . Most sports enthusiasts like twaterproof medical id braceletso wear silicone bracelets on their hands when sports events . At present , many sports people in international sports also remember to wear a personalized armbands for themselves . So all kinds of consumers choose to buy and wear it what"s the point ? First of all , the decorative function of personalized armbands is indispensable . At present , promotional silicone bracelets are recognized by many people in the market . The reason is that the appearance of silicone bracelets brings different visual senses , such as color , LOGO , pattern and shape . In addition , glow in the dark promotional silicone bracelets and UV promotional silicone bracelets are more popular . Silicone bracelets have some functional effects in addition to their appearance . For example , adding appropriate amount of energy powder (such as negative ions , germanium , titanium and other trace elements) to the silicone wristband can achieve some basic health care functions , mosquito repellent functions , and so on , while common silicone wristband manufacturers can add appropriate energy powder to meet the use requirements ! This personalized armbands is more suitable for sports enthusiasts . It can also prevent sweat from flowing into the hands after wearing it , which leads to the phenomenon of hand skidding . Finally , the cultural spirit represented by the silicone bracelets , more people choose the silicone bracelets because of the meaning represented by the personalized armbands . Since the first bracelet was created to resist cancer , and then triggered a boom in wearing the rubber bracelet , more people are willing to believe that the bracelet is a belief that will bring them good luck . The silicone wristband is not only an ornament , but also a symbol of culture .