Purdy's most popular roller covers use with all paints and exterior stains, especially where a smooth, lint-free finish is desired, White Dove™ Series features a high-density woven cover, made of dragon®, a derivative of nylon, which enables the paint to flow freely into and out of the cover for easy rolling and a high-quality finish, White Dove™ covers feature thousands of miniature flagged filaments so paint leaves from thousands of tiny surfaces for a smooth, virtually ideal finish, the high-density acrylic fiber is also capable of carrying large quantity of paint, leading to improved efficiency and productivity.