The practical backpack for car roofs can be attached quickly and easily to all common railing girders. It is suitable for railing beams up to 80 mm wide and 32 mm high. The material is made of water-repellent polyamide. The roof box features a zipper and fully sealed seams. Assembly is quick and does not require tools. It has a capacity of 270 litres for loads up to a maximum of 50 kg. The roof box is delivered in a practical storage bag.