Safely transport your big kid with R129. The lightweight Junior Maxi™ R129 highback booster allows your "big kid" to travel safely from 100-150cm (approx. 3.5 to 12 years). The Junior Maxi™ R129 features a one-hand, 10-position adjustable headrest allowing parents to quickly and easily adjust the height of the headrest as the child grows. The two hideaway cupholders hold beverages and offers a machine-washable cover. The Junior Maxi™ R129 has been rigorously tested to meet or exceed all applicable R129 regulations.