A Gear4 D30 Back cover will protect the back of your Apple iPhone X against scratches, drops, and bumps. The side of the case is made of D30 material, which consists of molecules that lock together and harden when you drop the case or when it bumps into something. After impact, the molecules automatically return to their flexible state. Thanks to the D30 material, Gear4 cases provide excellent protection for your smartphone, while staying relatively thin. The back cover features cutouts at the sides, bottom, and top, so you can keep using the buttons and ports on your smartphone.