Choosing the right carpet cushion is super-important because your family's comfort and your carpet's durability depend on it. Just because you can't see the cushion under your carpet doesn't mean it isn't working hard to help keep your carpet clean, cushy, and odor free. In fact, the higher the quality of the carpet cushion, the more comfortable your carpet will be underfoot and your carpet will look newer longer.
By keeping the spills at the surface, it helps stop stains from reappearing on the carpet.
Most common household spills won't penetrate the cushion to the subfloor.
Damaging water vapors exit the cushion to help prevent mod and mildew.