Spinal Solution, 2" Fully Assembled Foundation Bunkie Board, Twin Size : By adding firm support to any kind of bed for better back support, deeper sleep, fatigue reduction, spine position and blood flow : Stitch bond fabric material that can support heavy weight, can use two side-by-side to fit the matress MADE IN USA, color-grey color may vary : under your mattress, as your bunky board gives you consistent support which equals a great nights rest and less back stiffness : simply sliding it underneath, making your mattress feel firm, supportive, fresh and new : bunk bed, platform beds, daybeds with supporting slat system : Length-74 inches x Width-38 x Height-1.5 Weighs-10 lbs.