Topskin for the Nokia Lumia 1020 cover the back of the device and have cutouts for the ambient light and proximity sensors, so they protect without interfering with Phone operation. Topskin are made from stretch-resistant, premium vinyl material that come in a range of rich, vibrant colors and designs to suit all tastes. Our skins are guaranteed to extend the life of your gadgets body, by protecting it from scratches and the vagaries of wear and tear from rough handling in most conditions