Shed-resistant and high capacity For Today's Paints: flat, eggshell, satin. HydroFlow technology provides controlled release, prevents sagging. Lager-colored fabric exclusively from Wooster for fastest coverage, non-matting for longer life. Polypropylene core resists water, solvents, and cracking. 9 In., 14 In., and 18 In. have green double-thick polypropylene core.