Griffin Survivor for iPod touch 5th gen. (Purple) Designed and independently tested to meet conditions outlined in US Department of Defense Standard 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 (up to 18 m/sec for 1 hour) Silicone cladding blocks vibration (18 hrs at 20 to 2000 Hz)