wrist is a good way to avoid long time staying under strong sunshine. We add UV powder which is also green as silicone in production. The UV powder is kind of photochromic material. We use it to make this change. Photoreceptor color is irradiated by ultraviolet or sunlight, absorbs ultraviolet or sunlight, and produces changes in color. When it loses ultraviolet or sunlight, it returns to the original color. Photoreceptor products, after sunlight or ultraviolet radiation, can absorb the energy of the sun or ultraviolet rays, produce changes in the molecular structure, lead to changes in the absorption wavelength, and produce color changes; when the sun or ultraviolet energy is lost, the original molecular structure is restored and the color of the cost is reduced. Application of photosensitive discoloration material: coating, suitable for various surface coating products, including PMMA spray paint, ABS spray paint, PVC spray paint. Ink, printing of various materials, including fabric, paper, synthetic film, glass, etc. Plastic products, suitable for various kinds of plastic PP, PVC, ABS, silicone rubber and other materials, such as the ejection, out of shape. custom-camo-silicone-wristbandscool-silicone-wristbands on our website. Let me show you. Select bracelet style. The popular styles are debossed, embossed, colorfilled, printed and embossed printed.Colorfilled is a kind of bracelet debossed and filled with colors. It has a debossed effect on the surface of bracelet. Embossed printed silicone bracelet is made by mould also. Logo or text is more outstanding with embossed effect. black rubber wristband meaning Printed silicone bracelet is plain with a customized logo. Your logo or text can be printed on the surface of the blank wristband by the silk screen printing technology. It is especially suitable for personalizing complex logo. Select size. 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 itblack rubber wristband meaning all together 2mm thickness. For man, there is extra large size of 210mm and 230mm in addition. Select colors and quantity. Enter the message you need to put on the bracelet. You are able to make the message front and back or continuous outside. For the inside, the message can be printed or embossed.