I'm selling this because my pet has outgrown it. I used it for about 3 months. It can be stored slim when not in use. It can be secured with a seatbelt, making it safe for car travel. Made of plastic, it's easy to wash and care for. - The entrance can be opened and closed from either the left or right side. The door can be removed with one touch, and the removed door can be stored on the back. - With seatbelt fixing function Simply hook it onto the attachment for easy installation. ■ Suitable for: Extra-small dogs, cats, and rabbits (weight目安: under 5kg) ■ Product weight: 2.2kg ■ Size 　External dimensions when in use: Width 30 x Depth 48.5 x Height 31 (cm) 　Internal dimensions when in use: Width 26.8 x Depth 43.6 x Height 27.3 (cm) 　Entrance opening dimensions: Width 20.5 x Height 20 (cm) 　Folded dimensions: Width 30 x Depth 47 x Height 11 (cm)