DUAL COMPARTMENT DESIGN: Features 2 separate zipper-attached compartments to shelter 2 small pets. You can also remove the divider and turn 2 compartments into 1 compartment to shelter 1 small to medium-sized pet, suitable for people who have multiple small petsEXCELLENT VENTILATION&VISIBILITY: Comes with 5 breathable mesh windows and 6 ventilation holes on 4-side of the backpack, to provide plenty of air and great view for your pet. With zippers on both top and front, your lovely pets can be put in and out of the backpack easily