zCover Silicone rubber is an excellent healthcare grade material for keeping handsets protected in all kinds of environments. It withstands heat, cold, and UV. It is non-toxic, does not react with most chemicals or support microbial growth. zCover Silicone rubber retains its original shape even when stretched to its limit. It is tear and puncture resistant and has a very long life. Because it is safe to wash or clean with germicidal wipes, it is recommended for shared phones, especially in healthcare settings.