rubber wrist bands .It is precisely because of the variety of styles of silicone hand bands . The criteria for judging their quality are also differebottle opener keychainnt .Such as the printed rubber wrist bands ,our criterion for judging the quality of printed rubber wrist bands is whether the logo is clear and the color is correct . There are other ways to judge the quality of silicone hand bands . The first criterion is whether the plastic braclets is made of pure silica gel .The high quality rubber wrist bands is made of environmental friendly pure silica gel ,it has wear resistance,no deformation, no toxicity, no smell and no side effects on the human body .If we want to know if silicone hand bands are made of pure silica gel ,we can judge the quality of it by burning rubber wrist bands . If we don"t smell the pungent odor during the combustion process, and the product after combustion is grey powder ,the quality of the rubber wrist bands is good .The second criterion is whether the color of the rubber wrist bands correct .If the color of the wristband is same as the pantone color card ,the quality of the wristband is good .The last criterion is whether the edge of the rubber wrist bands smooth .A high quality rubber wrist bands ,the edge of it is very smooth . twenty-one-pilots-rubber-bracelettriple-single-rubber-band-bracelet 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. The bracelet is generally used as ornaments or jewelry, now more and more people use the bracelet to do business promotional gifts, souvenirs, gifts and so on. Currently a kind of silica gel made silicone bracelet is especially popular on the market. A silicone bracelet : 1, soft and comfortable to wear. 2 a customized LOGO is used for printing, promotional gifts, business gifts, or gifts. 3, incorporation of negative ion powder in the silicone bracelet has been bottle opener keychainreached to care for the human body,like promote blood circulation, anti fatigue and other health and body balance effect. This kind of bracelet is also called energy bracelet.