This heat pad has dual thermostats for safety, a control switch with night-light, 3 heat settings and a washable cover. It is available in size small (12”x15”) or size large (12”x24”). The heat pad is also available in the Dry Only version or in the Moist/Dry version. Just add water to the sponge of the Moist/Dry pad for moist heat or remove the pad for dry heat.