Citadel Extra Small Artificer Layer Brush.

Made from the highest-quality sable hair, the XS Artificer Layer is the best layering brush money can buy. Supplied with a plastic tube to guard it against the elements when not in use, this brush can really help you achieve results you didn’t think you were capable of. It’ll keep the finest point you’ll see on any brush - we’ve put a lot of care and attention into the design, and think you’ll truly love using it.