1.Unique Design: A clear bubble dome window backpack designed, acts like space capsule astronaut to comfortably carry your furry friends. Transparent view to allow pet to check surroundings and accompany with your outdoor adventure scenery. Take them out on your shoulders and not to leave them alone at home anymore. 2.Mechanism Dome Design: A built-in mechanism on bubble window, features switchable accessories between hemisphere clear bubble dome and honeycomb cover for better ventilation. Leave the cover idle and just mount the locking ring to have a giant hole in size of 6.2" / 15.7 cm, to allow pet's head to stick head out for easy breathing ever. Extra explored fun to access. 3.Excellent Ventilation: Constructed with a breathable mesh material to have large extension on back tent to ensure proper ventilation and visibility for your furry friend. Adjustable padded straps for a comfortable and secure fit via the chest buckle to carry transport your pet. 4.Dimensions: Measures approximately 13.0" W x 11.0" D (without back extension) x 16.5" H. The backpack itself is around 3 pounds only while is very lightweght but durable to hold any pets like cat, small puppy, bunny and small animals up to 13 pounds. We have the back extension feature to be a giant tent bag and playpen for ventilation ever too.