When installing a car seat in the car follow the instructions of the manufacturer to ensure that the child's safety is not compromised. For car seats installed using the car safety belt, ensure that the belt is correctly inserted in the guides and is not twisted or loose. For the car seat to effectively protect your baby or child, the harness – the Y-shaped belt for baby car seats (one strap goes between the legs and the other two on the shoulders) - must be secure. Car seats for older children come with 5 straps (one between the legs, two on the hips and two on the shoulders). The harness on rear-facing seats must be shoulder-height or slightly below the shoulders. For front-facing seats, the harness must be shoulder-height or slightly above the shoulders. Adjust the harness every day ensuring that the space between the harness and the shoulder is only enough to slip a finger under. Whenever possible, remove any thick or padded jackets as they will loosen the harness which then will slip off the shoulders. For R44 certified car seats, installation must be as follows: If rear-facing: the car safety belt must follow the blue guides; If front-facing: the car safety belt must follow the red guides; Daily use of these seats loosens the straps, so it is important to check them frequently - at least once a week - to ensure that the seat is stable and stays in place when the car brakes or in the event of an accident. Rear-facing car seats must be tilted to 45 degrees in relation to the base of the seat so they are not lying too far back nor too upright. In this way, they will support the baby's head and back evenly, distributing the any impact should the driver need to brake forcefully or in the event of a collision affecting the whole seat structure. There are two different ways to install R129 and i-Size certified car seats: the car seat comes with Isofix connectors attached to the seat, or it comes with an Isofix base. In both cases, these connectors (usually yellow) must be be pulled outwards to their full length and then attached to the two anchor points at the bottom of the seat of the vehicle, between the seat and the backrest. Once installed, a green light or a green mark can be seen on the connector, the seat or on the base indicating that the baby seat is installed correctly. Next, the third support point must be fixed to prevent the chair from rotating in case of accident. There are two ways to do this: The Isofix base has a support leg that must be fully pulled out and positioned on the floor - another green light comes on indicating that this step has also been carried out correctly. When the car seat is fixed correctly on the Isofix base a third green light comes on or a green indicator becomes visible; Car seats with no base come with a top tether - a strap with a connector on the end that attaches to a bar with the Isofix symbol on the back of the seat, the boot of the car, or the roof of the car. This strap must be pulled out completely, untwisted and pulled tightly through the middle of the headrest of the seat on which the baby car seat is installed. All R129 baby car seats installed with the car safety seat belt (some baby car seats and booster seats for children over 4 years of age) come with green marked safety belt guides.