The OTTY's most affordable spring and foam mattress, the OTTY Aura uses a combination of 70/30% springs to foam. One of the lowest price points in the bed-in-a-box market yet of a quality found in every OTTY mattress that would put most competitors to shame. Standing tall at 23cm in height it will fit any fitted sheet comfortably. So when it comes to affordable hybrid mattresses, our mattress is king (or double, single...)