The quality of that foam is the limiting factor in:

  • How comfortable your sofa mattress, RV mattress, marine mattress and truck mattress will be.
  • How long your replacement mattress will remain comfortable to sleep on.

We use the highest quality foam available for our mattresses. That’s almost all there is to say, except for some technical stuff:

Sofa Bed Replacement Mattress RV, Marine & Truck Mattress
Paramater Paramater Description Gold Platinum (All Styles)
Density Pounds Per Cubic Foot 1.8-1.9 (high density) 2.5 (highest density) 1.8-1.9 (high density)
IFD Indentation Force Deflection, (the measure of firmness) 48-50 (high compression) 41 (high compression) 23-26 (medium compression)
Thickness Mattress Thickness In Inches 4, 5 4 5, 8, 8(w/ memory foam)

What this means:
DENSITY –  Density is a measurement of the pounds of polyurethane foam per cubic foot. It is one of the most important of all foam properties. The lower density, the more air spaces there are in the foam. * High density foam products generally offer a great deal of support.

INDENTATION FORCE DEFLECTION – The Indentation Force Deflection (IFD) number represents the pounds of force required to indent a foam sample by a specified percentage of its original thickness.  * IFD is the measure of the foam’s firmness.

What this means to you:
• High density foams can be made very soft
• Low density foams can be made very firm
• There is no such thing as a “hard” or “soft” density
• There is a difference between firmness and support

Support is the foam’s ability to “push back” against your body weight, and prevent the foam from “bottoming out” on your sofa bed, RV, marine or truck replacement mattress frame or base.
Higher density foam helps prevent the feeling of having the foam collapse beneath your body weight.

OTHER FACTOR—Foam durability, flex fatigue and compression set are other terms related to foam performance. We concern ourselves with all of these factors and more.There are books written about the physics and chemistry of foam. For more information please refer to the Polyurethane Foam Association’s website: