A safe and comfortable car seat for children from 100 to 150 cm (approx. 3.5–12 years) that meets the ECE R129 (i-Size) standard. Thanks to its slim design, three seats can fit side by side in many cars. It offers enhanced side padding, an ergonomic headrest, new seat belt guides, and ventilation openings for comfort even on hot days. It can be used with ISOFIX or with the car’s seat belts only.
A safe and comfortable car seat for children from 100 to 150 cm (approx. 3.5–12 years) that meets the ECE R129 (i-Size) standard. Thanks to its slim design, three seats can fit side by side in many cars. It offers enhanced side padding, an ergonomic headrest, new seat belt guides, and ventilation openings for comfort even on hot days. It can be used with ISOFIX or with the car’s seat belts only.
i-Size safety and smart belt routing
The seat complies with the strict ECE R129 (i-Size) regulation, and the new belt guides help keep the seat belt in the correct position so it can’t slip out.
Slim design, big comfort
Slender yet generously padded side wings save space in the car, while the ergonomic seat and headrest ensure comfort even on long trips.
Easy installation with or without ISOFIX
You can secure the Kidfix M i-Size using ISOFIX connectors or just the vehicle’s 3-point seat belt—always safely and stably.
The BRITAX RÖMER Kidfix M i-Size is a smart choice for growing children. The high backrest with deep side wings, ergonomic headrest, and new belt guides help maintain correct belt positioning and boost impact protection. The slim yet thoroughly padded side sections save space in the car while providing reassurance and comfort.
Thoughtful ventilation at the back and pleasant cushioning ensure comfort on longer journeys and in summer. The seat is lighter than the previous generation, easy to move between cars, and thanks to height markers on the back, you can easily set the correct headrest position based on your child’s height.
- i-Size safety: approved to ECE R129 (i-Size) for children 100–150 cm.
- Space-saving: slim construction allows installation of up to three seats side by side (depending on the car).
- Easy securing: with ISOFIX or using only the vehicle’s 3-point belt.
- Travel comfort: ergonomic, spacious seat and rear-panel ventilation.
- Grows with your child: precise headrest height adjustment with helper markings.
