These Expiring Parking Permit Timing Covers work with Expiring Parking Permits (sold separately). These moderate weather Timing Covers are appropriate to use in weather over 80 DegreesF/25 DegreesC, and expire within one day. To activate, simply apply the Timing Cover to an Expiring Parking Permit and the expiration process begins - no need to collect used parking permits. Red color in the center indicates for hot weather use. Save time and keep your parking area more secure with Expiring Parking Permits today.