Which foam quality is best?

Which foam quality is best depends on use, but generally high density, high resilience foam is considered best quality for furniture and mattresses. For mattresses, best foam quality is high density memory foam of 4 to 5 pounds per cubic foot density which provides durability, support, and longevity, with CertiPUR-US certification ensuring low emissions. For sofa cushions, high resilience HR foam with density 2.5 pounds per cubic foot or higher and high support factor is best. For insulation, closed cell spray foam with high R-value per inch is considered best quality for energy efficiency and moisture resistance. For packaging, high density polyethylene foam is best for protection. Quality indicators include density, indentation load deflection ILD for firmness, resilience, durability, and certifications for safety. So best foam quality is high density, high resilience, certified low VOC foam appropriate for application, with memory foam best for pressure relief, HR foam best for seating durability, and closed cell foam best for insulation performance and moisture resistance.