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.