WOLF Corp Double Sided Reversible Ultra Plush Foam Encased Innerspring Mattress, King, Bed in a Box, Made in The USA Double sided, reversible mattress Innerspring unit is foam encased providing a greater sleeping surface Contains bonded pad for extra support, foam on both sides of the innerspring, contains pressure relieving convoluted foam in the quilt Medium firm support Comes compressed, rolled and boxed which makes it easy to ship and easy to install and Made in the USA!