... quality MULTI CLR Mixed Silicone Rubber Wristband Cuff Bracelet Silicone Wristbands, Wrist Bands, Rubber Bracelets, Silicone Bracelet, Rubber Wristband1. 100% high grade food ... of concentration, very helpfull for students, reseacher, businessman and athlete.3. size: can be suitable for adult and children.4. quality ...