iSeries 2914-15 Waterproof Case w/Cubed FoamSKB iSeries Injection Molded Mil-Standard Waterproof Cases are molded of ultra high-strength polypropylene copolymer resin, and feature a gasket-sealed, water- and dust-tight, submersible design (MIL-C-4150J) that is resistant to corrosion and impact damage. Other standard features include a molded-in hinge, patented “trigger release” latches, comfortable snap-down rubber over-molded cushion grip handles, automatic ambient pressure equalization valve (MIL-STD-648C), and resistance to UV, solvents, corrosion, and fungus (MIL-STD-810G).