After looking at my problem from another angle, I have another question.
What is a material?
Say that the prior art is cotton, but the invention calls for nylon that is woven in a particular manner that allows it function at a greater level than the cotton. Additionally, nylon would not work if it was purely substituted for the cotton.
Is the "material" selected the nylon, or the nylon woven in a particular manner? Even if the woven nylon is known, is it a material?
Basically does "material" include the composition and structure.
Has anyone ever tried to make this distinction?