Vista Lower Adaptors Mesa i-Size Car Seat / Carry Cot The Uppababy Vista allows for multiple second seat configurations. The Lower Adapters for the Vista allows you to attach a Carrycot or the Mesa i-Size infant car seat to the Vista as the secondary seat. Features: Quick, no-tools attachment Colour coded dot indicators to ensure proper instalment Pushchair folds with the adapters on Compatible with Carrycot and MESA i-SIZE infant car seat (not included)