The 3i-1813-5NT features a custom padded Think Tank-designed interior with a rigid removable flap that protects your laptop during transit and provides a sturdy work surface when in use. A heavy-duty hook-and-loop strap secures the laptop in place along with positionable foam blocks that help provide a custom fit for all laptops up to 16". Underneath the laptop are two removable clear accessory pouches that accommodate power supplies, cables, and other items. There is also a handy lid organizer for storage of other small accessories. SKB iSeries Injection Molded Mil-Standard Waterproof Cases are molded of ultra high-strength polypropylene copolymer resin, featuring a gasket-sealed, water and dust tight, submersible design (MIL-STD 810G) that is resistant to corrosion and impact damage. Standard features include a molded-in hinge, padlock loops, patented trigger release latches, snap-down rubber over-molded cushion grip handle, automatic ambient pressure equalization valve (MIL-STD 810G), and resistance to UV, solvents, corrosion, fungus and impact damage (MIL-STD 810G).