milliard 6-inch memory foam tri folding mattress with ultra soft removable cover and non-slip bottom (75 inches x 31 inches) milliard an ample 4 inches of medium-firm polyurethane foam supports a 2 inch layer of spongy soft memory foam for an ideal balance between supple body support and rich softness to send even light sleepers into dreamland without clunky springs or bed frames to creak or poke. perfect for an unexpected sleep over guest, camping and traveling. wherever you go and whatever you do, use the milliard tri-fold mattress for the sleep you love. for over a decade, customers have favored the comfort and reliability of milliard products as a brand they can trust. our design has you in mind, so you know your mattress is just right the first time, every time.