Serious painters, this KOH-I-NOOR filbert brush is an absolute workhorse in the studio! The size 18 gives you that perfect balance - big enough to cover substantial areas but still precise enough for detailed work. The Chinese hog bristle is what really makes this brush special - it's got that perfect springiness and stiffness that holds paint beautifully while still allowing for smooth, controlled strokes. The filbert shape with those rounded edges is incredibly versatile - I use it for everything from blending backgrounds to creating soft edges to painting foliage and hair. It works equally well with oils and acrylics, though I will say it really shines with oil paints where the stiff bristles can move that thicker paint around effortlessly. The silver brass ferrule feels solid and secure - no worrying about bristles coming loose during intense painting sessions. The polished wooden handle has that classic feel and comfortable balance that just feels right in your hand. After multiple cleaning sessions with harsh solvents (for oil painting), the bristles have held up remarkably well without losing their shape or spring. This isn't one of those cheap brushes that sheds bristles all over your painting - the quality construction is evident from the first use. Whether you're a professional artist or a dedicated hobbyist, this filbert brush delivers professional-grade performance that will quickly become one of your most reached-for tools. It's particularly fantastic for figurative work, portrait painting, or any situation where you need that perfect blend of control and coverage.