CLEAR BAG POLICY Towson University has implemented updated event security procedures, including the use of magnetometers (walk-through metal detectors) and a clear bag policy for all athletic events. APPROVED BAGS Clear plastic, vinyl or PVC bags not exceeding 12? by 6? by 12? One-gallon clear resealable plastic storage bags Small clutch bags not exceeding 4.5? by 6? - with or without a handle or strap Backpacks, tinted bags and large purses will not be permitted.