Griffin Technology Survivor Ipad 2 3 Blue Green Independently tested and certified to meet conditions outlined in US Department of Defense MIL-STD-810 Integral display shield deflects wind and rain (Test - up to 200 mm/hr for 1 hour) Rigid internal frame protects against shocks and drops (Test - drop on flat concrete surface from 6'/1.8 m) Sealed ports block blown sand and dust (Test - up to 18 m/sec for 1 hour) Silicone cladding blocks vibration (Test - 18 hrs at 20 to 2000 Hz)