Our ISOFIX car seat base is ultra-convenient. If you?ve got ISOFIX anchors in your car (and nowadays most cars do), then just pop your Hold 0+ car seat on and off your in-situ ISOFIX base. ISOFIX is minimal faff - just simplicity with a satisfying click that lets you know it?s fastened securely. No ISOFIX in your car? We also do a belted semi-universal base to be used alongside your 3 point car seat belt. Features: Comforms to ECE R44/04 Semi-universal ISOFIX (class E) fit Easy to install Compatible with Cosatto Hold Group 0+ infant car seat.