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Booster seat without backrest according to standard R129/i-Size

The R129 standard, also known as i-Size, is a European regulation that was developed for the safety of child car seats. It aims to offer children more protection and safety in the car. This guide will help you choose the best child booster seats without backrest according to i-Size for children with a height of approx. 100-150 cm.

What is the R129/i-Size standard?

The i-Size standard, which is gradually replacing the older ECE R44/04, sets stricter safety requirements for child seats. The main features include:

  1. Reinforced side impact protection standards.
  1. Rear-facing driving for children up to 15 months.
  1. Child seats are selected according to height rather than weight.
  1. Use of Isofix attachments for safer and easier installation.

Why a booster seat without a backrest?

A booster seat without a backrest is recommended for older and taller children, usually from 125 cm and aged six to twelve years. Such booster seats position the vehicle belt system so that it fits the child and offer a certain degree of side impact protection thanks to the correct belt guide, despite the absence of a backrest.

Selection criteria:

  • Compatibility: Make sure that the booster seat is approved for the i-Size standard and is suitable for the size of your child.
  • Installation: The seat should be easy to install in the car, preferably with Isofix attachments.
  • Safety: Although a backrest booster offers more lateral protection, the booster seat selected should still be solid and robust.
  • Comfort: The material should be comfortable and soft to make long journeys pleasant for the child.
  • Cleaning: Covers should be removable and washable.
  • Certification: Look for products that have the i-Size test mark.

Use and correct adjustment:

  • Positioning the lap belt: the lap part of the belt should be positioned over the child's thighs and not over the tummy.
  • Positioning the shoulder harness: The shoulder harness should run over the middle of the shoulder and never slip on the child's neck or arm.

Top recommendations:

Before purchasing a booster seat without a backrest, check the ratings and test results from independent test organizations such as ADAC and Stiftung Warentest. Popular and safe brands include Maxi-Cosi, Britax Römer and Cybex.

Safety tips:

  • Replace child seats immediately after all accidents, even if there is no visible damage.
  • Update the seat position and belt guide as your child grows.


A booster seat without a backrest that complies with the i-Size standard can be a safe alternative for older children who have outgrown their child seat with a backrest. Make sure it is approved according to the i-Size standard and check the fit before buying. Always remember that your child's safety on the road depends on the correct use of the seat.