The 3i-0907-4GP1 features a custom cut foam interior that will accommodate two GoPro cameras up to the Hero 4 version and includes a storage compartment for accessories as well as slots for batteries. The foam interior is constructed of high quality Stratocell foam with contrasting red capped foam. iSeries injection molded waterproof cases are constructed of ultra high-strength polypropylene copolymer resin and feature a gasketed, waterproof and airtight, submersible design (IP67) that is resistant to corrosion and impact damage. Its molded-in hinges, patented " mini 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.