Texsens Canvas Transparent and Breathable Bubble Pet Backpack for Adventure or Travelling (Multi-Color) Backpack material: The main material of the backpack is canvas which is more transparent and breathable than other materials, and it is more conducive to your pet for breathing fresh air. Semi-sphere windowThe semi-sphere on the top of the backpack can keep your pet safety and avoid your pet running away. Also good for your pet to feel the outside world. Mesh panels and ventilation holes: There are plenty of air holes and large mesh areas on the front and sides of the backpack for ventilation so your pet can breath freedom. Add a unique function: The semi-sphere has two conversion mode: the plastic shell on the top of the backpack can be switched to mesh panel or removed for small pets. Add a uPortable: The design of the shoulder straps make travel more convenient and comfortable, and you can save more energy when you carry your pet on the bag and go out on a trip.nique function: The semi-sphere has two conversion mode: the plastic shell on the top of the backpack can be switched to mesh panel or removed for small pets.