The Science Behind Better Sleep: What Side Sleepers Need to Know About Mattress Design

Side sleeping is the most common resting position, making mattress selection critical to sleep quality and spinal health. WIRED's expert testing, conducted by certified sleep science professionals, reveals the science behind proper lumbar support and pressure relief—factors that genuinely matter for side sleepers. Understanding these technical features empowers readers to move beyond marketing claims and invest in mattresses designed for their body's actual needs.