Mattress comfort depends primarily on three key factors: softness (the first thing most people think of), cushioning depth, and responsiveness. Together, these factors create an overall comfort experience.
Comfort is a completely subjective measure, so it won’t help you to know what your friend or the mattress salesperson or another consumer thinks is comfortable. It’s what you think that counts. And contrary to popular belief, comfort has nothing to do with whether or not a mattress is supportive. Nearly any level of comfort can provide you with adequate support and pressure relief.
These questions will help you select a bed that meets the comfort preferences of you and your partner.
Studies have shown that it can be hard for people to adjust to vastly different levels of comfort than they have experienced in the past. This is true even if you are switching bed types to an innerspring mattress
Side sleepers (the majority of people) often prefer more cushioning, since their weight is being supported by a smaller surface area of their body, creating more "pressure points." Stomach sleepers, on the other hand, tend to prefer a harder feeling mattress. Back sleepers generally fall somewhere in the middle, but have the widest range of personal preferences. Back sleepers that prefer a more upright sleeping position may also want to consider an adjustable bed.
Some people like how it feels to sleep “in” the bed, which can feel comfy and cozy, while others prefer to sleep “on” the bed, which can feel cooler and make it easier to reposition yourself. How far you sink into a bed is a function of the amount of cushioning the mattress has and the type of cushioning materials. It will also vary based on your weight, body shape, and to some degree your sleep position. Many mattress lines offer different choices in terms of how much you sink into the bed.
Along with the question of how much you like to “sink in” to a mattress is the question of how quickly the mattress regains its shape as you move around on it. Memory foam (think of that hand print that stays in the foam after the hand is removed) is a slow-response material that allows you to gently melt into the bed. But when you want to move, that hole you created doesn’t go away instantly, which you may or may not find comfortable.