A baffled roll vent for covering the ridge slot of a roof for allowing ventilation from the space of a building below the ridge slot, the baffled roll vent comprising a unitary panel defined by a length and a width, said width terminating at discrete louver portions. The center hinge allows flexing of the panel to conform to the pitch of a roof. The baffled roll vent may be used with a fibrous mat placed under the louver portions to prevent entry of particulate matter from the outside environment.