Britax Römer Kidfix M i-Size – The best car seat model for a growing family!
Parents always want the best for their children — and above all, to keep them safe at every age, from 3.5 to 12 years old.
Developed in collaboration with leading car manufacturers, the Britax Römer Kidfix M i-Size provides even greater impact protection and meets the strictest European safety standard ECE R129 (i-Size).
Thanks to its narrow, ergonomic design, it can fit three seats side by side in many car models — perfect for larger families.
🛡️ Outstanding protection & comfort
The slim yet deeply padded side panels offer excellent side impact protection, while the ergonomic headrest provides comfort and security.
New belt guides ensure that the seat belt stays correctly positioned at all times.
💺 A comfortable and healthy ride
Every detail of the Kidfix M i-Size has been engineered for full-body protection and healthy posture, reducing neck strain by up to 50 %.
The roomy, ergonomically shaped seat ensures a pleasant ride — even for older children.
📏 Grows with your child
The adjustable headrest with clear height markers helps parents easily find the correct position as the child grows or when switching the seat between cars.
🌬️ Breathable and summer-ready
Lighter by nearly 1 kg compared to its predecessor, the Kidfix M i-Size also includes ventilation openings for optimal airflow — keeping your child comfortable even on hot days.
⚙️ Advantages at a glance
• For children 3.5 – 12 years (100 – 150 cm)
• Ergonomic, spacious seating area
• Ergonomic headrest for maximum comfort
• Slim side panels with thorough padding
• Fits up to three seats side by side
• Adjustable headrest as the child grows
• Ventilation at the backrest for airflow
• Can be used with or without Isofix
• New belt guides for improved safety
• Complies with ECE R129 (i-Size)