Traditionally, companies have manufactured outdoor cushions using polyester pillow fiber because it is a cheap, albeit low-quality, product. Much like old bed pillows, this material flattens quickly. If your cushions are beginning to compress or sag, it might be time to consider replacements. Our outdoor cushion foam has a very high density at 1.8 lbs/ft³, helping it keep its shape for years. In contrast, cheap patio furniture made from inferior foam or polyester may look and feel good at first, but may quickly flatten. Our outdoor foam comes in three firmness choices (soft, medium and firm) and is a high-quality and comfortable upgrade from polyester fiber that will last much longer and maintain its shape better.