Our cat is getting fat and old. I know it is classified as a 'Dog Bed" however, the small fits him fine. We ordered this bed in hopes of making him more comfortable. This bed is like a plush egg-carton-style mattress with a nice velveteen covering and a cozy faux shearling mattress. The shearling part will show your pets fur depending upon the color of fur but, really; who cares--- He is sleeping on it, and the little cover sometimes stays up depending on him. We got him the Brown, as long as he's comfy, we're happy. :)