Every Defense Ultra case from X-Doria starts from a solid block of metal, machined to the finest detail to create the ultimate iPhone X device protection. The Defense Ultra contains four layers of protection for your iPhone 10; DropShield elastomer, hard polycarbonate, TPU and anodized aluminum. Meticulously combined, these materials allow this case to fit your iPhone X with ultra-precision without the bulk. The Defense Ultra exceeds the MIL-STD-810 test, a United States Military Standard for device protection that tests cases to conditions it would encounter throughout its lifetime. This means your iPhone X, while protected with the Defense Ultra case, can withstand drops of over 10 feet (3m) making it the most protective iPhone X cases on the market.