AmericanMade Full/Double Size 4 Inch Thick, Firm Conventional Polyurethane Foam Mattress Pad Bed Topper Made in the USA Instantly adds firmness to any mattress making it more supportive in sagging areas of mattress 4 inches of extra supportive firm polyurethane foam supports your body perfectly Made in the USA using enviromentally friendly processes. Exceeds PURGreen certification standards. Our Firm foam reduces sagging mattresses that cause you to toss and turn, so you sleep better. Topper features a 33 pound compression and a firm supportive sleep surface.