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Saggy couch cushions. “It’s usually caused by regular ... “Look for high-density foam, memory foam, or down-wrapped foam for the best comfort and longevity,” Hoffman advises.

The choice depends on how firm you want your sofa. “My favorite is memory foam for seating cushions,” Garcia says. “However, I prefer to use feather stuffing for the backrest cushions.

Over 40,000 rave reviewers agree that this memory foam cushion set transforms any chair into an ergonomic one.