Would you like a firmer mattress? How about a softer mattress? Anything is possible in our DIY mattress area where building a custom mattress is easier than ever.
To guide you through the process we have based our custom mattress options off our most popular mattress configurations. From there you can adjust the firmness of each layer to find the perfect fit for you.
The firmness of each layer is indicated by the ILD (Indentation Load Deflection) rating. It can also be referred to as the IFD (Indentation Force Deflection) rating. They are the same measurement. These are standardized metrics used to measure a foam's firmness. The lower the number the softer the foam. For example, a foam with a 20 ILD rating would be much softer than a foam with a 40 ILD rating.
However, there are some limitations to ILD measurements. Even though two foams (eg. high resilience foam vs. high density foam) have the same ILD rating they will feel different due the structural properties of each. Organic Dunlop latex is a high resilience foam. HR foams have a higher support factor which gives them a softer surface feel while providing support from deeper within the core of the mattress. High density foams provide support through the surface firmness.
The thickness of the material will also distort the ILD rating. Thinner pieces of foam are functionally softer than thicker pieces with an equivalent ILD.
Although it's not a perfect system, ILD ratings are the most accurate way to judge the firmness of foam. When building a mattress, the best results are achieved when the layers directly below and above have a similar ILD.
Don't worry if you don't get it right on the first try. All our DIY mattresses come unglued, and with a top zippered cover, so you can make comfort adjustments to find the perfect fit.