The wristband with watch series could be customized size, color & logo. They are made by cotton & elastic & nylon knitting together. Various watches are suitable for different usages and designs. You can choose electronic wath, quartz watch, single-function electronic watch and mulifunction-electronic watch etc.Our entire products passed the GB 18401-2003 criterion system which means it could touch the skin directly without any harm. The watches passed ROHS.