1. The frame is made of tough synthetic materials. For example, some backpacks are arched at the top and flatbottomed cuboid at the bottom, which is not easy to deform under stress and ensures the of pets in the bag; Equipped with reliable zippers, buttons or straps and other fastening devices to prevent accidental escape of pets. Use materials to avoid damage to your pet's skin and 2. According to the size and weight of the pet, choose the appropriate size of the backpack to ensure that the pet can ly turn, lie down and stretch its limbs in the bag, and will not feel cramped; The interior of the backpack is lined with soft cushions, and the bottom is thickened to ease the feeling of bumps during walking. Some backpacks are also designed according to the body structure of the pet to improve comfort 3. A variety of carrying methods, in addition to the common double shoulder straps, the top is also equipped with a hand handle, which is convenient for the owner to carry, and some backpacks can also be carried on a single shoulder or crossbody to meet different scenes and needs 4. Set up transparent window, convenient for the owner to observe the state of the pet at any time, but also to meet the curiosity of the pet to the outside world, the material and firmness of the window, to prevent damage by pet scratching. In the two ends of the backpack, the middle and other positions are provided with tough grip and bite resistant mesh vents to ensure air circulation, maintain fresh air in the bag, to avoid pets stuffy discomfort