The Mifold booster car seat conforms to the most universally accepted global booster car seat regulations such as ECE R44.4 for the EU, and FMVSS 213 for the USA. These standards are different, and as a result, there are some minor design changes between the versions. Specifically, the product dimensions differ slightly from country to country. Secondly, the labelling and language requirements vary between territories. This means that the labels and instruction manuals are different based upon the market. Finally, in all territories, whilst the Mifold booster seat is designed to be used by children from the age of four years old. However, there are also height and weight recommendations that vary according to the country.