A cover mattress is an ornamental mattress considerably just like a four-poster bed. A typical cover mattress usually features posts at each of the four corners extending four ft excessive or extra above the mattress. Ornate or decorative material is usually draped across the upper area between the posts and a strong swath of cloth may create a ceiling, or cover directly over the bed.
A four-poster mattress is a mattress with four vertical columns, one in each corner, that help a tester, or upper (usually rectangular) panel. This tester or panel will usually have rails to allow curtains to be pulled across the bed. There are a number of antique four-poster beds extant dating to the sixteenth century and earlier; many of these early beds are highly ornate and are made out of oak. An instance of such an early sixteenth-century four-poster resides in Crathes Castle, which was made for the original citadel house owners in the Burnett of Leys family.