The 2015-later MESA has been updated with breathable and ventilated fabrics on the SIP integrated headrest and infant insert.
The 2015-later MESA does not support the European Routing Method for carrier only installation. You can still get a secure installation by routing the lap portion of the seatbelt through the two lap belt guides on the carrier. Please refer to your manual for more information.
Lastly, the manual and locking clip has been moved from the carrier to the bottom of the base and labels updated in an effort to help with installation and ease of use.