That's so windy ... Simple pleated Karton.Die side strips of paper, were an hour off already. Since I, as indicated, sprinkled with catnip from the supplied bags, mint -the fell through the holes in the box and everything was on the carpet were my cats about her and soon after the Kartonnage was nassgeschleckt and pressed. Since then, they are no longer interested in the part. For scratching totally unsuitable.