Formulated with an exclusive blend of nylon and polyester fabric， Marathon lasts longer， paints further and provides a smoother finish with less lint. Marathon is perfect for large projects as it can take wear and tear while providing consistent coverage and great final appearance. This roller cover series also has superb paint pick-up and release properties for increased productivity with less trips back and forth to the bucket. Use with either oil-base or water-base paints and for interior or exterior applications.