Britax Roemer - Diamond Hi-Liner I-Size Car Seat

The new HI-LINER is the ideal car seat for anyone looking for a reliable and easy-to-use booster seat. Designed and manufactured in Germany, HI-LINER meets our highest standards of comfort and safety on the road.

Our high back booster seats protect your child in 3 ways: the seat shell provides head to hip protection for your child, especially in the event of a side impact; upper and lower belt guides allow for correct positioning of the seat belt; and the padded headrest provides safety and comfort for your baby's head and neck.

Adjustable backrest
The adjustable backrest of the child seat allows you to adjust the angle of the vehicle seat, providing a better fit and a comfortable position for your child.

Easily adjustable ergonomic headrest
Our headrest is specifically designed for the comfort of older children and can be easily adjusted to the correct position. Helpful markings on the back of the headrest guide parents to find the right headrest height whenever changing seats between cars or carrying multiple children in the same seat.

3 seats in a row
The seat's slim and compact design allows three seats to be installed in the back row of a wide range of cars.

New ISOFIX connectors

The new Isofix connectors can be operated independently of each other and thus make installing the seat even easier.

Removable cover
Machine washable seat cover that can be easily removed, so you can quickly clean up and hit the road.

Sustainability
The even more sustainable HI-LINER comes in a compact recycled cardboard packaging, efficient in transport.

Data sheet