These coolers are very well insulated and the Cat can easily warm it up with it's own body heat. Made from an Igloo or Coleman 120 qt cooler Pod measures 16" x 33" x 14" deep on the inside. Will fit 3 to 4 cats. There is a piece of removable carpet on the floor. The standard 6" doors fit cats up to 14lbs and the large door fits cats over 14lbs or small dogs. THESE PODS SHIP IN 2 TO 3 BUSINESS DAYS.