The Pro-tones canvas pad by Paramount feature 11oz, double-primed, cotton canvas with acid-free binding. The Pro-Tones All-Media canvas pads feature three canvas sheets of all four tones for a total of 12 sheets .They are available in 4 popular background tones: Seafoam, Sahara, Dune and Studio Grey. These tones allow artists to see colors more accurately either inside or outside en plein air, because they create a softer and more forgiving background than the traditional white color. Their surface consists of an isolating layer, with three coats of primer. Also Available in professional size rolls, turned edge panels over MDF hardboard.