Raft-R-Mate 22-1/2 In. X 4 Ft. Attic Insulation Rafter Baffle Proper Vents 70-P. Insulation Accessory Type Rafter Vent. Owens Corning Raft-R-Mate attic vent is an extruded polystyrene foam vent designed to assure unrestricted airflow from the soffit to the ridge vent.