Hi Stephanie,
There is some confusion about Latex International’s terminology because they often call their blended Talalay “natural” and their 100% natural Talalay “all natural” which is very misleading and results in many manufacturers mistaking or misdescribing one for the other.
You can see some examples of their labels here and here and you are correct that their 100% natural has an “N” rating on the label while the blended Talalay has an actual ILD rating on the label.
There is more about the difference between 100% natural Talalay and blended Talalay in post #2 here and they are both high quality materials. Even though the blend can be a little more durable, the 100% natural is more costly and I would want to have accurate information about the type and blend of the latex in a mattress I was purchasing so I could make more meaningful “apples to apples” comparisons.
Phoenix