EFM Aspen D3O Case Armour - The worlds most protective material. Aspen is 6 meter drop tested, offering 360 degree device protection when combined with our Screen Armour without impeding or restricting any functions of the device. The stadium screen edge prevents damage from a flat drop or scratches to the screen. EFM Aspen D3O Case Armour is one of the slimmest, clearest and toughest cases on the market. Allowing the user to truly appreciate their device for longer. For slim but tough device protection, EFM Aspen D3O Case Armour is the tried and tested solution.