BoostApak is the multi-award winning product from the Trunki brand. The law requires all children under 12 years old or 135cm in height to use a booster seat, so it's important to always have one with you. We understand that this often isn't convenient. BoostApak is the ideal solution; a spacious, hand-luggage approved back pack which doubles as a booster seat, perfect for family holidays and car-pooling. BoostApak Suitable Group 2 and 3. Suitable for children aged between 4-11 years. Colours: Green, Pink.