A housing for an electronic device can include a body having an exterior surface and a second surface disposed opposite the exterior surface at least partially defining an interior volume, the body defining a first repeating pattern of apertures extending from the exterior surface to the second surface. The housing can also include a component defining a second repeating pattern of apertures, the component positioned adjacent to the second surface. The first repeating pattern of apertures and the second repeating pattern of apertures can combine to define an open area of at least about 70%.