Our Catalina Twin/Full Bunk Bed Collection features solid pine wood with a deep chestnut stain finish. The solid pine wood construction ensure that your children's bed with 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.