OPT Silicone Armor Case with Carabiner Clip for Apple iPhone 4/4S - PURPLE OPT Silicone Armor Case is exclusively made using virgin silicone embedded with propriety i-pure 3-in-1 energy formula. The armor case comes with stainless steel wire-cage to ensure the case stays securely on your iPhone, and provide added protection. It also comes with custom made carabiner hook and strap to allow you wearing or carrying your iPhone. Protect your iPhone from scratch, shock, bump and dust. By AppleStyle: Imported.