The ideal firmness level of a mattress depends on individual preferences and needs, including your sleeping position and any existing back pain or discomfort. However, here are some general guidelines:u003cbru003eu003cbru003e- Side sleepers: A medium-soft to medium-firm mattress is generally recommended for side sleepers, as it provides the cushioning needed to relieve pressure on the hips and shoulders, while also providing enough support to keep the spine aligned.u003cbru003e- Back sleepers: A medium-firm to firm mattress is usually best for back sleepers, as it provides the necessary support to keep the spine aligned and prevent back pain.u003cbru003e- Stomach sleepers: A firm mattress is typically recommended for stomach sleepers, as it helps prevent the spine from bowing and causing back pain.u003cbru003eu003cbru003eIt's important to keep in mind that mattress firmness is a personal preference, and what may be comfortable for one person may not be the best for another. It's recommended to try out different mattress firmness levels to determine which one is best for you.