The Ivory Range are 100% Synthetic, Vegan Friendly.
They are great for Oils, Gouache, Acrylics and Watermixable Oils.
The Ivory is synthetic bristle at its best, a cross between the feel of nylon and hog bristle. The longer hair results in a loose brush with little "snap".
The Long Flats (also known as Flats) allow for a longer, looser stroke. They have a sharp edge and allow you to fully load your brush. They carry a lot of paint, and the longer length of hair should mean you don't need to load paint right to the end of the base (the ferrule).