The high density white knit fabric on these roller covers make them ideal for use with the new thicker Paint + Primer paints on the market today The increased density of the fibers provides excellent paint pickup for more coverage between loadings and fewer trips to the paint tray The 100% polypropylene core with patented thermo-bond technology not only seals the fibers to the core to keep them from releasing into the paint but also holds up under hours of use and can be cleaned again and again for re-use These rollers perform to ensure a high-end look on flat and eggshell finishes in small spaces where a 9 in. roller simply won't fit Up to 30% faster project speed Easy clean up For drywall, wood, light textured walls and ceilings White roller cover for semi-smooth surfaces Ideal for painting smooth or semi-smooth surfaces like walls and ceilings Roller Type: Trim Use with Paint Type: All Paints and Stain