Now to the reason why I have the envelope currently closed but in an airtight container: At first I thought the pungent smell after opening the package would surely soon disappear. Head and respiratory problems could eventually can also happen to coincide with the opening of this product, even though I'm actually a little troubled by dergleichem. Unfortunately, I realized also that the skin of my hand burns when I had my S4 and its case a long time in hand. These symptoms are unfortunately hardly become less over time. Since this is highly likely not an allergic reaction, the case with a star is still rated good.