Isofix fixings are carried on board and hidden in the seat base. They are released simply and easily with integral handle on the front of the seat base. Features top tether system. Both top and bottom fixings have a clear indicator to help customer determine if it is fitted or tensioned correctly. Red square showing incorrect, green square showing correct. The ability to retract the fixings means that if the car does not have Isofix ability the Key 1 Isofix can still be used as a normal 3 point seat belt fixing seat. Harness height and head cushion move together and adjust up or down easily with single button on rear. Ensures correct fitting, positioning of straps and best protection for child in use. Conforms to Group 1 (from 9 to18kg of weight). ECE R 44/04 approved. 5-point harness with one pull adjustment. Deep seat shell and side panels for extra side impact protection and head containment. Soft padded wide seat, with extra padding in ergonomic positions of contact with child body. Back rest and head rest are vented to aid air circulation for child comfort. 4 seat positions for added comfort, easily adjusted. Includes strap and buckle pads. Shoulder/chest pads fastened to straps to prevent twisting The base of the seat is slim to suit even the narrowest car seats.