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 which is *commonly* used to conform with 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