As long as you take careful measurements, it’s easy to re-stuff and re-upholster old RV cushions. Feel free to base your measurements on the lengths and widths of the old cushions; however, it’s best to measure the inside height capacity of your intended cushion covers so they are thick enough to fit comfortably. Consider Your Options It’s likely that the density (durability) and ILD (Indentation Load Deflection, firmness) ratings will be different for the new foam you choose, so take some time to test and feel materials. Combining two different kinds