A mattress is a large, rectangular pad for supporting the reclining body, designed to be used as a bed or on a bed frame, as part of a bed. Mattresses may consist of a quilted or similarly fastened case, usually of heavy cloth, that contains hair, straw, cotton, foam rubber, etc., or a framework of metal springs. What you’re wearing, your bedroom temperature, how much your partner snores, or if you use electronics in bed all impact how well you sleep each night, but the single biggest factor is one that you might not think about – your mattress. The truth is, whether you wake up feeling rested and ready to start the day depends largely on the age of your mattress and its current condition.