When choosing the best foam for sofa cushions, focus on comfort, durability, and support. High-resilience (HR) foams with a density of 35–50kg/m³ are widely considered the best options for long-term performance. These foams maintain their shape over time, provide excellent support, and feel soft yet firm while sitting. Whether you prefer a plush seat or firmer support, selecting the right density and foam type—such as polyurethane, memory foam, or latex—will ensure your sofa cushions remain comfortable and supportive for years. Always match the foam to your usage needs to get the perfect balance of quality and comfort.