Crystal palace is constructed of three clear materials, starting with the TPU exterior. This slim-fitting case boasts injection-moulded D3O® technology with a PC backplate made of the same material used in bullet-proof glass. The raised bezel and new edge textures provide an industry leading complete drop protection. D3O® is a world-renowned specialist impact protection company, that uses its unique knowledge and know-how to advise regulatory bodies on the best practice for impact protection. D3O® is a patented material proven to deliver superior impact protection through advanced shock absorption. D3O® is used by the military and medical field as well as in workwear, sports apparel, motorcycle apparel and footwear. D3O® material has a unique molecular structure that is soft and flexible, but on shock, the molecules lock together causing impact energy to dissipate which reduces force and then returns to its flexible state. The greater the force of the impact, the more the molecules lock together and the greater the protection.