The nania befix sp is a stylish and affordable group 2 3 high back booster without harness which is suitable for children between 15kg33lbs 36kg79lbs approx 4 years to 11 years it has a height adjustable head support with side impact protection that grows with your child lightweight and portable it is easy to move between cars it is used with the back unit attached throughout to provide maximum protection the cover is removable and hand washable in warm water