Mastering Comfort: Foam, By the Numbers

When selecting foam for a DIY mattress project, understanding the meaning behind the numbers on a foam label is essential to achieving the desired comfort and durability. A foam labeled 1830 provides key insights into its composition and performance. The first number, 1.8, refers to the foam's density, which measures its weight per cubic foot—1.8 pounds in this case. Higher-density foams are more durable, resistant to sagging, and provide consistent support over time. This makes density a critical factor for longterm performance, especially in high-use areas like mattresses.

The second number, 30, represents the foam's ILD (Indentation Load Deflection), a measure of firmness. ILD is determined by the amount of force (measured in pounds) required to compress the foam by 25% of its original height. For example, a foam with a 30 ILD means it takes 30 pounds of pressure to compress a 4-inch piece of foam to 3 inches. A higher ILD indicates firmer foam, while a lower ILD results in a softer feel. A 30 ILD represents medium firmness, which provides a balance of support and comfort suitable for most sleepers. By understanding these two key factors—density and ILD—you can confidently choose materials that will meet your needs, ensuring your DIY mattress is both comfortable and built to last