Choosing a mattress isn’t just about soft or firm—it’s about how the bed is built from the inside out. Different construction types, such as all-foam, innerspring, hybrid, and more specialized designs, each offer their own balance of support, pressure relief, motion isolation, and temperature control. Understanding what’s underneath the cover can help you match a mattress to your body type, sleep position, and comfort preferences, so you wake up feeling rested instead of restless. Use this page as a guide to the most common mattress construction types and how their design details can impact your sleep.