7071 Mattress and Boxspring 7072 Mattress: Bunk Bed The dh Firm is a great introduction bed for kids and complements the dh line. Handcrafted with synthetic materials, dh Firm is hypoallergenic, mildew resistant, and odor free. The dh Firm comes with a foundation unit under the full coil mattress for a more supportive feel. The dh Firm is designed exclusively for Drexel Heritage beds and comes with a 10-year warranty. Available in all size. Item Number: dh Firm Dimensions: 38" x 19" x 75" (WxHxD) Finish: No Finish Specified