RIGID: 600D Polyester. Tested to hold 100lbs. Withstand the wear and tear of repeated use. Doesn’t slide around in your trunk. ROOMY: 21” x 15.7” x 10.5” | 3 Insurance and Registration Wallet + 4 Mesh Pockets for easy access to smaller objects + Large Storage Compartments. The organizer comes with two stiff PE base plates and a detachable sub-divider for better arrangements. INNOVATIVE - GLOW IN DARK: The outstanding reflective silver edges help locate the organizer in shaded/dark area.