Kraken a ms consists of shock absorbing silicone inner layer covered by a hardened polycarbonate outer casing with a built in screen protector to provide maximum protection kraken a ms cases meet military standard mil std 810f for drop vibration dust sand and rain independently tested kraken a ms protects device power ports audio jacks and speakers with tpe plugs and dust filters to keep out dirt and debris the double thick impact resistant tpe corners protect your device from