For a long time, I've been carrying my passport in an RFID paper sleeve, with my Global Entry card tucked inside.  I'm always afraid the card will fall out or be misplaced.  I didn't want a passport wallet because I already have an RFID wallet for everything else.  Just wanted something RFID-protected to keep my passport and Global Entry card together.  This slim case fits the bill perfectly!  The smooth leather sleeve holds my passport snugly, and the slot on the back is just the thing hold a Global Entry card.  Now I have a tidy little package with a spot for each item.  Easy to check to make sure both are there.  I chose red so it can be easily seen in my travel bag.  I am delighted to have finally found a simple, well-made case that does exactly what I need it to do!