Arches & Halos Dual Ended Blending brush is made with synthetic bristles and ideal for blending product underneath the brow to highlight. On the other end of the brush there is a spoolie for brushing through the brows. Dual Ended Blending Brush; Professional grade brush; Synthetic bristles; Cruelty-Free, Leaping Bunny Approved; Ophthalmologist Tested, Dermatologist Tested, Hypoallergenic;