<P> There are two main types of boosters: high back (some of which have energy absorbing foam) and no back . A new generation of booster seats comes with rigid Isofix (Latch) connectors that secure to the vehicle's anchors, improving the seat's stability in the event of a collision . </P> <P> The consumer group Which? is calling on manufacturers and retailers to phase out backless boosters, as it says they don't provide enough protection in side - impact crashes and could put children at risk . So while backless booster cushions are better than using no child seat at all, they do not provide adequate protection in all circumstances . </P> <P> Used for Groups I, II and III . </P> <P> After reaching one year of age and 20 pounds (9.1 kg), children may travel in forward - facing seats . Most Scandinavian countries require children to sit rear - facing until at least the age of 4 years . This has contributed to Sweden having the lowest rate of children killed in traffic in international comparisons . </P>

When did it become law to use car seats