The Safe-T-Seat is the UK' s new market leader in the world of The certification confirms that the (iBert) Safe-T-seat Is designed for and capable of carrying children between 20-33 pounds (9-15 kilograms) or ages 9 months-5 years old Has a good restraint system, with a child-proof quick release buckle, that holds the child in place; and Met requirements for strength and durability, among others, during high-and low-temperature testing