1.Breathable: The bird carrier backpack has ventilation holes on both sides and front, which is breathable and won't make your pet birds feel stuffy. Multiple ventilation holes are designed to promote air circulation, keep the internal space cool and keep pets active. 2.Transparent Design: This pet bird backpack is designed with a transparent appearance, which does not block the bird's view and allows them to see outside. It is easier to alleviate pet anxiety. It can provide a display of pets and also facilitate the owner to observe its condition at any time. 3.Large Space: This pet bird carrier adopts the design of a backpack. Its shoulder straps are adjustable. Comfortable backpack structure, no sense of load bearing. Large spaces allow birds to ly spread their wings or move around. 4.Wooden Perch: This pet bird carrier backpack comes with a wooden perch that is easy to install, giving birds a place to stand and rest. The length of the standing perch is 32cm or 12.6in. The thickened bottom cushion provides comfort and helps keep the backpack clean, easy to clean and maintain.