| 摘要 |
A main mattress and a supplement mattress attached thereto. The supplement mattress may have a main body having two lateral extensions, a footboard extension, a headboard extension, and a tubular structure. Extensions can be rotated 90° or 180° together with the tubular structure. A fitted sheet may also be provided. The surface of the mattress assembly can be expanded and it may provide a safety barrier for preventing the user from falling to the ground. |
