Twin Size Daybed Metal Frame with Trundle Set, Twin Day Bed Sofa, Daybed and Roll Sofa Bed for Guest W840104493: The platform slats are designed to support a twin size mattress without the need for a box spring, saving you money and space. The metal slats support the mattresses not to slag and allow air passing freely beneath your bed, keeping your mattress fresher longer to increase the mattresses life. Recommended Mattress Thickness 6" 8" [ Sturdy Metal Day Bed ]: The twin day bed is made of high quality metal with superior craftsmanship for optimized