We have a newer couch and it has real firm couch cushions on our couch, but the problem we have, is the springs sink down low when you sit on them. And by putting these pads under the cushion has made a difference for us. I feel the comfort and firmness we needed. Good quality. Thickness is great for us. U can order even thicker. They are thicker in middle then the fronts abd back, and when your couch cushion is placed on top it was not noticeable that there was a pad under it. If i went bigger then i might have noticed . Comes in a vacuumed packed bag. And once opened it unrolls and puffs up. And came with thin gripper cloths or sheets for each pad. The fit is great .and easy to work with.design was made well to meet the support. Very functional. Pleased with order.