ALLPRO® MASTER SELECT™ roller covers include HydroFlow Technology with shed-resistant fabric with advanced engineering, excellent for all coatings. HydroFlow technology provides high paint pickup & controlled release. Unique fiber interaction helps transfer the paint from the cover to the surface at a very efficient rate. Resists matting & is easy to load. Green double-thick polypropylene core resists water, solvents & cracking. For use with all coatings.