This Sleephouse has hard plastic walls that stand the test of time. Kitties can sleep inside or rest on top. Zips apart and lays flat for shipping and storage! All K&H heated beds and pads feature dual thermostats and are designed to warm to your pet’s normal body temperature when he/she lies on the pad. When your pet is not on the pad, the heat will dissipate into the air and the surface temperature will vary according to the ambient air temperature.