Terraforming Mars Insert v2: - Rules of Play says:
Insert compatible with Terraforming Mars®, and includes space for the Hellas & Elysium®, Venus Next®, Prelude® and Colonies® expansions. Insert also compatible with Turmoil® expansion components. 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 boards and player boards act as a lid on top of the trays. There is space for all cards to be sleeved.