Abstract: A sport helmet assembly includes a helmet with a helmet shell and a visor. On its front side, the helmet shell with a helmet shell edge defines an upwardly-limited facial clearance. The visor includes upper and lower visor edge regions. A left bearing arrangement for the visor has a left sliding guide and a left pivot axis, and a right bearing arrangement for the visor has a right sliding guide and a right pivot axis for pivoting and displacing the visor by the bearing arrangements during a manually executed displacement movement. An available displacement length of the sliding guides and a thickness of the sealing element on the visor measured from a visor inner side in the direction of a helmet rear head side are dimensioned such that the sealing element is pressable against face portions below the user's eyes in the visor closed position by the sliding guides.