The 3i-0907-4GP2 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 a high quality Stratocell foam with a 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.