The basics My Flat Definer™ has a carefully hand crafted, tight, flat, brush head made from natural fibers. The benefits This detailing brush holds both powder and cream product perfectly, allowing for the tightest eye-lining and brow definition. The uses For perfect tight lining, use the tip of this brush and a black eyeshadow or gel liner and press along the lash line. The bottom line Voted SHEERLUXE Favourite for Best Application brand of 2023. Hair: Synthetic. Length: 16cm (Approx. 6")