Test sleepers said they felt more secure near the edges—important for couples who use the full width of a king mattress. During test sleep sessions, people of different body types felt supported without sinking, especially when switching from back to side.

Test sleepers said they felt more secure near the edges—important for couples who use the full width of a king mattress. During test sleep sessions, people of different body types felt supported without sinking, especially when switching from back to side.