BabyStyle Oyster 3 Multi Car Seat Adaptors Use the multi car seat adaptors to transform your Oyster 3 Pushchair into a Travel System. Simple adaptors which attach to an Oyster 3 pushchair chassis to allow an infant car seat to be fitted. These car seat adaptors are compatible with the following car seats: Oyster Capsule (i-Size) Infant Britax Römer Baby-Safe 3 i-Size Britax Römer Baby-Safe iSense Maxi Cosi Pebble Maxi Cosi Pebble Plus Maxi Cosi Pebble Pro Maxi Cosi Pebble 360 Maxi Cosi Rock Maxi Cosi Cabrio Fix Maxi Cosi Tinca Maxi Cosi Coral Maxi Cosi Marble Cybex Aton Q Cybex Cloud Q Cybex Cloud Z Besafe Modular iSize Kiddy Evo Luna iSize 2 Joie I-Level