This is used in a specific way on this website. It means how deeply you sink into a material that is used for a comfort layer or the depth of the pressure relieving cradle that is formed. It is very different from sinking down.
This is used in a specific way on this website. It means how deeply you sink into a material that is used for a comfort layer or the depth of the pressure relieving cradle that is formed. It is very different from sinking down.