Diamond Nina Twin Hybrid Mattress with Copper Cooling and Euro-TopProduct Overview The Diamond Nina Twin Hybrid Mattress offers a supportive and comfortable sleep solution ideal for bedrooms. Featuring a medium feel with temperature regulating materials, it blends foam and spring technologies for balanced rest. Key Features Constructed with copper infused memory foam to help regulate temperature by drawing excess heat away from the body Includes a hi definition transition layer to enhance a buoyant, weightless sleep