The back of the ZenFone 2 Laser is not flat, but slightly curved. This makes it particularly comfortable and grippy in the hand. All edges and corners are diamond-cut, and the casing tapers to a delicate 3.5 mm towards the edge. The surfaces of the back cover, the rear button, and the area below the display are elaborately refined with the distinctive, special ASUS ZEN brushing, making them highly durable.