Trident Kraken A.M.S Series Case for iPhone 5/5s - Retail Packaging - US Air Force Lifestyle Meets Military Standard MIL-STD-810F: Vibration, Drop, Rain, Dust, Sand. (Independently Tested). Inner-layer of shock-absorbing silicone with an outer-layer of hardened polycarbonate, providing two layers of protection. Power-ports and audio-jacks are covered with silicone plugs to keep out dirt and debris. Dust filters protect microphone and speaker bays. Green Protection - recyclable, degradable, and compostable plastic Built-in screen protector provides the ultimate screen protection