If you’re used to a traditional mattress, your new Enso mattress may feel different at first. That is not an uncommon first night’s reaction. . As you sleep on the mattress, it will respond to your body weight and temperature, conforming to your body, and feeling more as the bed you tested in the store. This is a similar process as breaking in a new pair of shoes, it will take a few days to achieve that perfect conforming feeling you are after.. It’s important to note that after it’s completely broken in, your mattress retains the responsiveness it has straight from the factory for years to come.