er team sports is very important to our life. It is very popular among scredit card bottle openerports players. Let us see several kinds sports bracelet. Glow in dark silicone wristband is popular for night event. But it is also good for night walk or run. A glow in dark silicone wristband can glow green or blue after absorbing strong light energy. The glow will fade gradually in about 3h and will recover absorbing light again. UV silicone bracelet is a good choice for out door activities or sports like Climbing, rock climbing, cliff descent, kayaking, diving, sailing and so on. A UV silicone bracelet can transfer it’s color darker under sunshine when absorbing UV light. It transfer to purple or blue normally which indicating the strength of the UV index. Wearing it on the wrist is a good way to avoid long time staying under strong sunshine. A mosquito repellent silicone bracelet is very useful to protect ourselves from the mosquito outdoor. It is made from high quality silicone together with lemongrass, lavender, clove and other natural plant oils. And the natural plant oils is the reason why it is mosquito resisting. Usually sport player has bigger size of wrist than most of us. So we have to choose the right size. There are 6”(150mm) for toddler, 7”(180mm) for youth, 8”(202mm) for adult and extra large of 210mm, 250mm in circumference and 1/4”(6mm), 1/2”(12mm), 3/4”(19mm), 1”(25mm) in width. We make it all together 2mm thickness. k and white stand for standing up and speaking up. Blue stand for beatting bullying. Pink stand for supporting knowledge strength. Blue and white stand for one world one cause Blue and green stand for say no to sectarianism. Also a silicone bracelet can be used as a promotional item for entertainment or sport. It is hot sale as a advertisement gift. Most of the silione bracelets are of no meanings , people wear it just as a popular jewellery. After proper dewatering , the silica gel mSiO2?nH2O become a porous mass that is of credit card bottle openerdifferent particle size. This is so called the silicone. The silicone has the open vesicular structure , large specific surface. So it can absorb many substances as a good desiccant, adsorbent and catalyst carrier. Adsorption of the silicone is mainly the physical one that can be regenerated and good for repeated use. Let the silica gel soak in the cobalt dichloride solution then get it dried and activated , will become the allochroic silica gel. It will transfer from blue to red color when absorb water. Changes in color shows the degree of water absorption and whether need the regeneration treatment.