1. Portable design: The portable and foldable cat bag cleverly combines two carrying methods—backpack and carryon. With openings on three sides, it makes it much easier for your cat to get in and out. Additionally, the bag can be easily stored and takes up minimal space. 2. Breathability: The breathable and foldable pet backpack features fullbody mesh panels. The large mesh design ensures air circulation, allowing your cat to breathe fresh air at all times and avoid discomfort from stuffiness. It creates a cozy, wellventilated space for your feline friend. 3. Visible window: The front of the breathable and foldable pet backpack is equipped with a transparent window. This allows you to monitor your cat's condition at any time for added safety, while also letting your cat see you in unfamiliar environments to reduce anxiety. The quality window material is clear, durable, and scratchresistant. 4. quality material: The exterior is made of Oxford fabric, offering durability and resistance to daily wear and tear. The inner lining is crafted from soft, smooth polyester, ensuring it won't scratch your cat's fur or skin while providing gentle comfort. The mesh windows further enhance ventilation for your pet's wellbeing.