Comfort ratings are on a numeric scale of 0 to 10 with descriptions of “Soft” to “Hard”. In order to “score” each of our mattresses on this scale, we performed a series of firmness tests with a Cornell Tester to measure the firmness of each mattress. These ratings were then converted to a 10 point scale by taking the ratio of each firmness rating to that of the highest reading. Using this method, we defined our hardest product, The Orthopedic Ultra Firm, as a 10. All other scores were calculated on a relative basis.