What does "Deep Profile Cotton" mean when talking about a canvas?

Question: What does "Deep Profile Cotton" mean when talking about a canvas!?
Best Answer - Chosen by Asker:

The CANVAS in these terms usually is heavyweight, high quality canvas for professionals!. ideal for heavier paint applications!.

some types of these canvases, you can look at and buy here:
http://www!.dickblick!.com/categories/canv!.!.!.Www@QuestionHome@Com

Sounds like a rougher woven structure which creates stronger indentation!?Www@QuestionHome@Com