This new transport box is ideal for transporting your pet in the car, train or plane thanks to the solid plastic. The plastic is easy to clean. The box is hygienic and practical. On the side, the box has barred windows, which on the one hand allow the dog an all-around view, on the other hand he has so enough fresh air. The door is made of a sturdy material and has a double closure. The boxes, all four sizes, are IATA compliant and therefore allowed on airplanes! Please read the assembly instructions for the transport box carefully before you assemble the box. All but the smallest model have wheels which allow for comfortable transportation. Two handles allow you to pick up and load the box.