"Features: HEATED COMPARTMENT DESIGN: The pocket on the back of the sleeping bag can be used for small animals to sleep in the warmer seasons, but it has a more important function, which can place USB heating pads or heating pads, so that small animals can warm through the winter in areas without heating TWO SIZE OPTIONS: Considering the different needs, cage pouch offer two sizes, small size is 9.9 x 5.6 inches, big size is 11.9 x 7.1 inches, you can choose as your need EASY TO INSTALL & WASHABLE: Our pets pouch use stainless steel clip, and allow you to hang the pouch either on the flat side of a cage or in the corner for a more easily accessible entry to the pouch COZY MATERIAL: The sleeping pouch is made of imitation linen and super soft flannel, and in order to entertain your little pet, we offer two colors for your choice, one is blue, the other is yellow as the picture shows SAFE DOUBLE SEWING DESIGN: The sleeping pouch adopt more safe sewing design that Inside and side seams have been double sewn to prevent exposure to loose threads, which can wrap around limbs and cause injury Package included: 1 pcs. Note: 1.Please allow slight size deviation due to manual measurement. 2.Please allow slight color differences due to different computer and site settings!"