 The steel structure is fitted with a base which is adjustable in height to grant extra safety and stability to the seat when used by babies under 9 kgs |  The shoulder straps can be opened and inserted in the special elasticated slots, set on the sides of the car seat to make the use of the safety belts easier |  Belt which can be adjusted with one hand according to the size of the child. It allows you to pull the safety belts to the correct position |