Root Insert: - Rules of Play says:
Insert compatible with Root®, and The Riverfolk®, The Underworld®, The Exiles & Partisans Deck®, The Vagabond Pack® and Resin Clearing Markers®. 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. The insert is arranged in three layers. Note that this insert is designed, together with the rule books, to fill the base game box. The boards and player boards need to be stored separately in one of the expansion boxes.