Trident Case BYOC-IPH4S-PP/YL Build Your Own KRAKEN A.M.S. Case for iPhone 4/4S - Retail Packaging - Purple/Yellow Meets Military Standard MIL-STD-810F: vibration, dust, sand, rain, drop (Independently Tested) Shock-absorbing silicone Hardened polycarbonate plastic shell Built-in screen protector Accessorize with A.M.S. attachments