A helmet for receiving a head of a hockey or lacrosse player, the helmet comprising a front shell; a rear shell, the rear shell comprising inner and outer surfaces and an elongated slot extending along a longitudinal axis of the helmet; a rear inner pad for facing the back and left and right side regions of the head, the rear inner pad being mounted to the rear shell; an occipital inner pad located below the rear inner pad for facing the occipital region of the head; a central member extending along the longitudinal axis of the helmet, the central member comprising an upper part hingedly mounted with respect to the rear shell and a lower part mounted to the occipital inner pad; and a single wedging member located between the rear shell and the central member, the single wedging member being movable along the longitudinal axis of the helmet from a first position to a second position wherein, in use, in the first position, the occipital inner pad applies a first pressure upon the occipital region of the head, and in the second position, the occipital inner pad applies a second pressure upon the occipital region of the head, the second pressure being greater than the first pressure.