Black Dell Essential ES1520C Briefcase/Carrying Case for 15" to 15.6" Notebooks: The Dell Essential Briefcase 15 (ES1520C) has a bright, reflective graphic on the front that improves visibility in low light. View More Keep yourself safe while you're out and about. In low light, the Dell Essential Briefcase 15 (ES1520C) is a standout due to its reflective front panel design.