Why the silicone bracelets / wrist bands are so popular with people?

The silicone bracelets/ silicone wrist bands are first popular in USA, but now they are very popular with all the people all around the world. Because they are not only fiery-hot and fashionable ornaments / decorations, but also are low cost advertisement sales promotion gifts. And we can get promotional purposes with them without paying much more ad-rate. Because of the silicone bracelets/wrist bands are made of environmental silicone, and they meet European normalizations, there is no harm to our skins. Moreover we also can put our companies’ LOGO or message on them. It means that we just pay a little ad-rate for advertising, but the adverting effect is high and better, so nowadays, they are very popular in the advertisement sales promotion markets.