Shadow unique base construction is stronger and lighter then a conventional cargo box. It cuts through the wind with sleek aerodynamics, stealth like designs that produces better MPG. Shadow also includes the new memory mount systems for easy installation. • Stiffer base for stability • Dual side opening for easy loading • Ample 16 cubic foot capacity • Universal Mounting System mounts to square, round, and most factory crossbars • User friendly locking mechanism for single handed opening • Includes keys & locks