This case features built-in wheels, offering tilt-and-go transport, and is water resistant, making it excellent protection for your keyboard. i-Series injection molded waterproof cases are constructed of ultra high-strength polypropylene copolymer resin and feature a gasketed, waterproof, submersible design (IP67) that is resistant to corrosion and impact damage. Its molded-in hinges, patented "trigger release" latch system, comfortable, snap-down rubber over-molded cushion grip handle, secure stacking, and automatic ambient pressure equalization valve (MIL-STD-648C) all contribute to its military grade design.