1. Large Size13.8 x 9.8 x 21.7in (35x25x55cm), telescoping handle height is 39.4'/100cm. The telescopic handle is an aluminum alloy rod, which is sturdy and durable. The double layer design can accommodate two small pets, or one small to medium pet by removing the divider. The double layer pet backpack is made of durable cationic linen that is scratch resistant. 2. Ventilation The mesh design is very breathable and can also realize air circulation and convection. There are entrances and exits at the front and above for your pet to get in and out. 3. Universal WheelsFour 360degree rotating silent wheels push and pull smoothly. The wheels are made of wearresistant rubber and are removable. 4. Multiple PocketsThe side pockets allow you to store essential pet supplies, and there is also a small side pocket that can hold a garbage bag. Your pet can be well cared for when out and about.