GLASS by Expert Shield - THE ultra-durable, ultra clear screen protector for your: Canon G7X MKII / G7X - GLASS Your Expert Shield is made from optical grade glass cut to fit your Canon screen. Your Expert Shield comes with a no bubble guarantee. Your Expert Shield also comes with a no scratch guarantee. Actually, your Expert Shield is pretty much guaranteed to make you happy (we guarantee it). Oh, and those guarantees last for the lifetime of your device. Because we love you.