Master Polyester Knit roller covers are the perfect blend of performance and value. The high density polyester fabric provides greater coverage and durability. The full body fabric eliminates matting and spattering. They rollers are ideal for use with flat, eggshell and satin finishes. Designed for the professional painter, these versatile applicators are engineered to deliver an outstanding finish in less time with less effort. The high density polyester fabric for greater coverage and durability. The full body fabric eliminates matting and spattering. They rollers are ideal for use with flat, eggshell and satin finishes.