Safety, comfort and convenience make the Pinnacle ClickTight with Cool Flow an exceptional Harness 2 Booster Seat. At Britax, we're making safety cool your child will enjoy a comfortable ride thanks to our Cool Flow technology. The ventilated mesh fabric improves air flow and the padded seat and head rest ensures added comfort. Car seat installation is easy as buckling a seatbelt thanks to the ClickTight Installation System. In the Pinnacle Harness 2 Booster Car Seat you are surrounded in safety. This booster seat features the patented Britax SafeCell Impact Protection system which includes a steel frame, energy absorbing base, V shaped tether to minimize seat rotation and staged release stitches that slow and reduce forward movement in the event of a crash. Britax designed the Pinnacle ClickTight Seat with three strong layers of side energy absorption; a deep foam lined shell, head protection, and external cushions will shield your child from the most severe type of collision. Two integrated cup holders keep drinks and snacks within reach and are easy to clean between rides. The 9 position quick adjust harness grows along with your child and it's easy to transition from a harness to a belt positioning booster by tucking the buckles and straps within the seat. The Pinnacle ClickTight Harness 2 Booster Seat can be used in Harness Mode for children 2 years old and 25 to 90 lbs. or in Booster Mode for children 40 to 120 lbs. Child standing height using the harness 30 58" and using booster mode 45 62". Dimensions minimum 22.5 W x 28 H x 21 D, maximum 22.5 W x 36 H x 21 D inches. Seat width 12". 9 Position harness slot heights 12.5" to 20.5". Child Seated Shoulder Height Forward Facing Harness 12.5 20.5 inches. Child Seated Shoulder Height Booster 15 23 inches. May not be compatible with all vehicles, see user guide.