The miniuno Tripiie i-Size car seat features side impact protection, an adjustable headrest, and padded fabric for a secure and comfortable environment that grows with your child. The Tripiie meets i-Size ECE R129 safety standard for children of height 100cm to 150 cm (approx. 4 to 12 years). What is R129? R129 is the most up to date safety standard for car seats. Main features of R129 car seats: -Tested by the height of your child rather than weight -Advanced side impact protection testing -Rearward facing- children must be rearward facing until at least 15 months Belt Fitted Design Your child is safely secured in the miniuno Tripiie using the car's 3-point lap and diagonal seat belts, ensuring a snug fit during every journey. Features advanced side impact protection and deep padded breathable fabric with energy-absorbing materials guarantee not only safety but comfort for your child. Grows with Baby The miniuno Tripiie features 8 adjustable headrest positions for maximum support and comfort for yout little one. As your child grows older, the seat back can be effortlessly removed from the base, transforming the car seat into a booster seat. This versatile feature provides that extra little boost your child needs as they continue to grow and transition to the next stage of car safety.