The Uppababy Mesa i-Size Car Seat is designed to be easily installed in your car. To deliver better head, neck and overall protection, the Mesa i-Size has been out hrough the first-ever side impact testing standards. Mesa i-Size’s headrest uses the absorption and recovery properties of both memory and EPP foam to provide unmatched protection. Along with an adjustable headrest and 3-point harness, the Mesa i-Size will keep your little one safe in travel.Features: Rearward facing car seat Height adjustable headrest  Carry handle with stroller release button Integrated 3-point harness system Keeps baby comfortably cool thanks to a built-in ventilation system Removable seat fabric for spot cleaning Compatible with the Uppababy Vista, Cruz and Minu pushchairs (using car seat adapters - sold separately) Removable infant insert ensures proper positioning Two crotch buckle positions Better airway management for babies less than 60cm with enhanced ventilation Extra-large integrated, extendable canopy with SPF 25+ provides protection and conveniently folds awayDo I need a base? You will need to purchase the Uppababy Mesa i-size base (sold separately). Install the base in your car and click the car seat into the base. The car seat can also be installed using a 3 point seat belt. The base can easily be connected to the ISOFIX points in the car. Clear indicators show when the base is correctly fitted and perfectly level. Weights & Measurements: -Car Seat: 25.8”L x 17”W x 23”H -Car Seat (with base): 28”L x 17”W x 25”H -Weight of carrier: 4.3 kg (4.5 kg with infant insert)The UPPABaby Mesa iSize Group 0+ Car Seat delivers protection and comfort without compromise. Perforated holes in the shell of the car seat, combined with breathable mesh and EPP foam with vented channels, create more comfortable airflow. Mesa i-Size’s adjustable headrest integrated with a unique 3-point harness eliminates the need to take the system apart as your baby grows, providing lasting security.