BNIB & authentic What it is: A brush with diagonally cut, synthetic bristles that suits any eye shape and can be used to define, blend and diffuse cream, powder and gel formulas. What it does: Its high-performing fibers provide a cushioning effect, while a revolutionary hidden core maintains the tool's shape and creates the perfect balance of strength and flexibility. Handcrafted in Japan, the ultrasoft brush brilliantly deposits color and quickly diffuses any hard edges.