Everdell Insert: - Rules of Play says:
Insert compatible with Everdell® including all Collector’s Edition content and the Pearlbrook®, Bellfaire® and Spirecrest® expansions. The design provides both efficient storage and improved game play. Many of the trays can be utilised during the game, and they greatly aid set-up and clear-away times. There is space for all cards to be sleeved.