Introducing LyDia Professional Eco-Friendly Natural Wooden Handle makeup brush range. CONCEALER BLENDING BRUSH: Anyone looking for a smoother, more flawless concealer application. A professional concealer brush that allows you to apply and blend at the same time. It's the ideal brush for covering undereye circles. Expertly designed to blend concealers, it leaves you with invisible coverage so all you see is skin. Use with correctors and concealers to apply, layer and blend.