Our Catalina Twin Bunk Bed Collection features solid pine wood with bright white paint finish. The solid pine wood construction ensure that your children's bed will last for years to come. The Storage Staircase provides a safe way for your children to reach to top bunk and also has tree drawers in the stairs for extra storage. *** Bunkie Boards are required to provide proper support for your mattress. All Catalina beds come with 3 wood slats.