4-in-1 Double Pet Stroller with Detachable Carrier and Travel Carriage This 4-in-1 multifunctional pet stroller comes with 2 detachable pet carriers, which can be used as a double pet stroller as well as a carrier bag, pet crate, or car seat, allowing you to transport your pet to the vet for their annual exam, walking, shopping, and travel. Besides, the pet stroller is crafted with premium oxford cloth and a metal frame, which not only resists water and has long service life but also ensures safety and stability. And it features several zippers and doors allowing you to put the pet in the stroller from the front, back, and middle. What's more, the dog and cat stroller is designed with ventilated windows so that you can observe the pet's condition all the time as well as promote air circulation.