The Isofix Base Tulip combined with the Tulip car seat achieves optimum protection through the use of Isofix fittings. The base unit is fixed into the vehicle with the Isofix anchor points. The car seat is then simply attached onto this base unit. While the car seat can be flexibly removed, the base unit remains fastened in the vehicle. Isofix is a standardised fitting system which is extremely safe and simple. Please refer to the user manual of your vehicle to find out whether it is compatible with Isofix.