Dear customer, Thank you for choosing our products. If there is any problem with our products, please contact us through the order information. We will be happy to serve you and solve it for you as soon as possible within 12 hours, thank you! Size: 12CM x7CM x7CM, ideal for transporting rats, hamsters, mice, chinchillas, etc. Soft and comfortable: Soft velor with mesh window, it is breathable and pleasant when you go out with your favorite. Except the window, everything is closed well with cloth, it make security, convenient to calm animals. Zipper: Safe and easy to use, no problem getting out or losing. The warm plush inside the cave provides a comfortable compartment for sleeping and hiding. Adjustable and detachable shoulder strap: Take on the shoulder to free your hands as soon as you go out. Shoulder Bag/Messenger Bag: Multi function to carry the little ones and also work for keys, cellphone, change, ect.