This insert is rather simple and is designed to hold sleeved cards. NOTE: I had purchased the Kickstarter version of this game. Thus, I may have different counts of cards from the retail version. I want to ensure, due to the small box, that this will hold all versions, thus I am goig to disclose card counts. My insert will hold, via premium sleeves, (21) Argo event cards (with room for several more), (15) Exploration cards (with room for several more), (25) Hero cards (wth room for a couple more), (16) Port and Legendary Encounter cards (with room for a few more).The board and manual fit on top of the insert.