Breathable and Durable: Made of sturdy ABS material and high quality Oxford cloth with nine holes and air mesh. Provides better anti-scratch and air circulation air circulation. Airplane Approved Cat Backpack: 13" L x 11" W x 16.5" H (Airline Approved- generally acceptable for use, please do consult your airline before traveling). Suggested for: 0-17lbs pets. Safe and secure: The bubble window provides your pet with a clear view of the outside world while keeping them safe and secure inside the backpack, giving you peace of mind while out and about. Ergonomic design: The soft and breathable back and shoulder strap design can effectively reduce backpack stress and absorb sweat, keeping you comfortable.