FoamRush 4-Inch (48″ x 75″) High Density Foam RV Mattress Replacement with Cotton Cover, Medium Firm, Pressure Relief Support, Travel Camper Trailer Truck, Made in USA, CertiPUR-US Certified

High density foam has a compression rate of 44lbs. It features the perfect amount of cushioning and stiffness. Its soft but still holds its firmness and support for an individual to sit on it without compressing the foam too much. Compression = firmness compression (not density) is what determines firmness. If you dont want a cushion thats hard as a rock or a mattress that sinks when you sit on it, you have to check the compression or ild number. Compression means the number of pounds necessary to compress a piece of foam 25% and still bounce back to the original thickness. For example, a 4″ thick piece of foam that requires 33 lbs. To pack it down 1″ and have it return to its full 4″ thickness has a 33 lb. Compression rating or (ild) -indention load deflection. Do not open with a box cutter. Use a ball point pen or a pencil. Start by making a little incision and break it from there – durability : will last 7 to 10 years high density foam is used for firmness with a touch of softness for comfort, which is most popular for mattresses & cushions. It has high quality compression and material to keep it lasting for longer periods of time even when harsh weight is applied. Get it right the first time It is also a good idea to know the size and the Height of your mattress ahead of time to make sure you are ordering the correct size. Keep in mind that you should combine the Height of your bed frame, foundation, or adjustable bed base with the Height of your mattress to get a gauge Of the how tall your sleep system will be. Note: Cover is not included. A 50% restocking fee may apply on returns.