We bought this seat, saying he would serve us or our older 2 years and a half which was in Group 1 is to our 9 months was to pass a group 1. We first tried to small but with the shield it seemed that his arms were too elevated compared to the rest of his body. Finally we gave it group 1 of his brother with harness (without shield) and the big brother who is not yet 15 kgs took concord with shield. It is very well accustomed to it. Nevertheless we can not wait to remove the famous shield.