The cozy n safe hudson group 1/2/3 car seat (9-36kg) ensures that the integral harness can be used up to 25kg providing an extra level of safety that the 5-point integral harness provides, 7 kg more than the typical car seats in this category. the hudson has added side protection, it can also be fitted using is-fix & top tether or the adult 3- point seat belt. other features include a adjustable headrest and a self adjusting harness.