The Wooster Brush Company offers Ultra/Pro professional paintbrushes with three distinct filament blends: soft, firm, or extra-firm. The brushes are made with the company's NylonPlus filament. The two original Ultra/Pro lines have updated packaging to help match the brush to your job. Ultra/Pro Firm brushes are designed to provide time-saving performance in medium-bodied paints and warm temperatures, indoors or out.