The Gear4 Denali case provides additional protection with a layer of Bio D3O that covers the edges and back of the inside of the case. Featuring a textured polycarbonate back plate, this durable case promotes a better grip and is perfect for those looking to protect their device without making it bulky. D3O APPROVED A world-renowned impact protection company, D3O uses its unique knowledge and expertise to advise regulators on impact protection best practices. D3O is a patented material known to provide superior impact protection, thanks to advanced shock absorption. It is used in the military and medical fields and is used in the manufacture of work, sports and motorcycling clothing, as well as boots and shoes. Its unique molecular structure is flexible and soft to the touch, but in the event of an impact, the molecules solidify, which disperses the energy of the impact and reduces its force. The molecules then return to their flexible state. The higher the force of the impact, the more the molecules solidify and the greater the protection.