05/28/2026
It's just cardboard! Well, yes and no. There are different flutes for different purposes, and for each flute, a variety of different weight liners (top and bottom of board) and mediums (the waves paper in the middle). By choosing the right "board combination" you can have a vastly different strength of "cardboard". It may look the same, but you can feel the difference in weight and strength when heavy weight liners and medium are combined to make cardboard. At Kidz Forts, we chose heavy weight materials for strength and durability. No short cuts. Made in the USA.