1. Material: environment-friendly silicone. 2. Features: wear resistance, high temperature resistance, non-deformation, non-toxic, tasteless, no side effects on human body and long service life. 3. Advantages: soft, no cracking, long service life, no irritation to the skin and other advantages. 4. Purpose: suitable for parties, festivals, promotions and other occasions, suitable for people of all ages. 5. Wrist circumference: 145-210mm short watchband band: 105MM long watchband band: 128MM width: 20MM.