What is edge support and do I need it?

Edge support is how firm the perimeter stays when you sit or sleep near the side. Strong edges give you the full sleep surface, make getting in and out easier, and prevent that roll-off feeling. It matters most for couples, heavier sleepers, and anyone who sits on the edge of the bed. Hybrids and innersprings with reinforced perimeters hold edges best; soft all-foam beds the least.