矩形頂部睡床靠墊淺灰色（床=24x17x6吋）

The old cushion was completely flattened, but this replacement is the exact 22x17 size and holds its shape perfectly on the top platform. My cat claimed it within five minutes of me setting it down, and the light grey matches the rest of the setup nicely.

The light grey color matches my cat tree perfectly, and at 22x17 inches it fits the platform without any overhang. My cat took to it right away, though I wish it were a bit thicker than 2 inches for extra plushness.