The BeSafe iZi Twist B i-Size is a rotation seat that is equipped with 3 layers of safety for newborns: » built-in SIP (Side Impact Protection) in the seat shell » SIP+ (addtl. Side Impact Protection) that can be attached to either side of the seat » baby insert called BeSafe Baby Shell™ What is special about the Baby Shell™ is that it is not just cushions added to a toddler seat, but is a whole own unit inside the seat that truly resembles the protection and position of a baby car seat. This makes the iZi Twist B i-Size a baby and toddler seat in one and allows you to use it from birth on up to 105 cm/max. 18 kg, which is approx. 4 years. The iZi Twist B i-Size embodies BeSafe’s vision of rear facing travel by being rear facing only and allows your child to travel 5x safer rear facing up to 105 cm/max. 18 kg. It is approved to the latest safety regulation UN R129 (i-Size) and has passed the world’s toughest crash test: the Swedish Plus Test.