Go Survivor Strong This impressively slim, ultra-rugged iPhone 11 case is built to protect and built to Survive Drops. Survivor Strong is proven to meet or exceed MIL-STD 810G standards for durability it can withstand 10-foot (3.0-meters) drops onto concrete and is designed with our proprietary FortiCore technology along the bumper to help absorb and disperse shock. FortiCore provides a 40% increase in drop height protection compared to traditional case material. Thin Is an Understatement It's quite a feat to have a case this thin be so protective, but Survivor Strong was crafted to exceed expectations. Plus, it's incredibly lightweight at just over one ounce.