I ordered two of these air mattresses for the island vacation. At 30 ° in the shade inflating the mattress has indeed anything but urlaubliche relaxation but if you can then push on it across the sea, it was worth the effort. The top is made of smooth, the lower side of grained plastic. The most anticipated plasticizer odor reduced with time but remains present in minor amounts. The air mattress has two small inflation valves, one in the area of the foot end, which feeds the Hauptkorbus, and one in the area of the head end, which feeds the head cushion. The "holes", or inside the mattress Bookings will serve to ensure that they can be filled with water during the journey and make the sun for cooling as well as to stabilize the foaming material. On the beach, the air mattress can be used as a classic sun lounger. It is advisable, however, set under a towel and spendieren the mattress after a while more air because the material expands a bit. Overall, highly recommended, a patch was also included, a guide, packed in a cardboard box.