My father is being given a Logitech ultrathin keyboard for his ipad air birthday present. It seemed the least worst of the choices. It only covers the front of the ipad not the back. We will have to remove his all over protective case to use it. Does anyone know of a back shell or case of some sort that would work with it and protect the ipad rear? All I have found so far is a suggestion of a stick on vinyl skin which would protect against scratches but do nothing for impacts. Thank you.