Old Navy Mystery offer up to an ADDITIONAL 50%

Do you get email updates from old navy? If you do check your mail! I received an email this morning with a unique code that could give me an additional 20%, 30%, 40%, or even 50% off my Oldnavy.com purchase til 10/11!  I'm heading over to check my code out and see what it is worth! Remember most of these are going to be on the lower side, but i hope some readers gets some big ones!