Hi Debbielc21,
19 ILD is one of the ILD ratings for Latex Internationals blended Talalay. Their 100% natural Talalay is rated on a different scale from N1 to N5 and each rating could be a range of ILD’s. Most suppliers don’t carry the N1 and their softest version is the N2 which is in the “range” of 22 ILD.
If you are committed to 100% natural Talalay … then Sleep Like a Bear has all the products and ILD’s that are made by Latex International in a range of thicknesses including the N1 even though they are a little more expensive than some other suppliers. As you can see here, the N1 is between 14 and 19.99 ILD and the N2 is between 20 and 24.99 ILD (with a nominal ILD of 22).
Several of the suppliers listed in post #4 here carry 100% natural Talalay made by both Radium and LI (including SleepEz and Mattresses.net) and it may be worth calling them to find out the softest version they have because they often have layers that aren’t listed on their site although I don’t think they carry the softest 100% natural Talalay layers because of potential durability issues with softer ILD’s in 100% natural Talalay.
Phoenix