If you’re used to a traditional mattress, your new Tempur-Pedic mattress may take some getting used to. As you sleep on the mattress, it will respond to your body weight and temperature, conforming to your body, and feeling more “natural“. This “break in“ period lasts for a couple of weeks. During this time, the TEMPUR® cells are fully opening—so they can optimally adjust to temperature changes and weight. It’s important to note that after it’s completely broken in, your mattress retains the responsiveness it has straight from the factory, so it feels more like new every day. The TEMPUR® cells offer their conforming support throughout their life.