ISOFIX compatible child seat base Cybex Base One Price negotiable This is a base specifically for the Cybex Aton S2 i-Size. I used it for about a year until my child outgrew it. This model is no longer in production, so I'd be happy to pass it on to someone who needs it. It has been placed on the ground, so there are some minor scratches. Please refrain from purchasing if you are overly concerned about this. Thank you.