The performance of many carpets will hinge on the performance of the cushion. Spending a few extra dollars on cushion can mean extra years of performance for your carpet. Some carpet warranties also hinge on the grade of cushion you select. Carpet cushion affects the luxury feel underfoot, quietness, resilience, cleaning, insulation, and, ultimately, the life of your carpet. Crushing or flattening of your carpet fiber causes it to look ugly long before it’s useful wear life is over. Quality cushion will help resist this condition.