Choice: 2 sizes are available-S, M. This pet crate is used to transport your four-legged friends in a relaxed and comfortable way, suitable for small and medium-sized dogs or cats. Small pocket: The small pocket on the side is handy for changing diapers and small dog snacks. Main bow | rope safety buckle: the collar is buckled, the dog's head can be fixed, and the dog can stick its head out to see the scenery. The interior safety buckle can be connected to your pet's collar and two buttons on the mouth of the bag to prevent your pet from accidentally falling Breathable mesh surface: mesh material, lightweight and comfortable, breathable, fine workmanship, long time loving pets, not stuffy, made of soft and breathable cotton, providing a comfortable and skin-friendly place for your pet, allowing you to stay with you happy. Wide range of uses: these cat backpacks are suitable for walking, hiking, camping, traveling and other occasions. It is also a great gift idea for friends or family members who have pets on Christmas, Thanksgiving, Valentine's Day, May Day, etc.