Octopus watch is "hypoallergenic”.  It means that the risk of allergic reactions is reduced. It doesn’t mean it is allergy-proof. 

Our wristbands are silicone based and they conform to hypoallergenic standards.
If your child has allergic reactions or you know that they are allergic to silicone, we would recommend replacing the wristband with a tissue based one or other material. To replace the bracelet check this article: Replacing the bracelet of your kid's watch