The Seven Master Cat Backpack Expandable Carrier Bubble Bag is perfect for taking your cat or small dog on the go. With a durable construction and spacious design, this backpack provides plenty of room for your pet and all their belongings. The backpack features 9 vents and 2 grids for good ventilation, and a detachable security leash for added safety. The backpack also has a large storage capacity, with a total capacity of over 44 pounds.