Stila's innovative, double-ended brow pen features two complementary shades to expertly sculpt and fill in eyebrow hairs for natural-looking, flawless eyebrows. One side of pen includes the precise Stay All Day Waterproof Brow Color micro-fine brush-tip applicator to draw hair-like strokes, while the other side contains a 4-prong brow applicator to fill in and blend colour into brows. Smudge-proof, transfer-proof, sweat-resistant, and waterproof, this 2-in-1 tool allows you to easily shape, style and define brows and achieve amazing balayage-brow effects with a flawless, air-brushed finish that lasts from sunrise to moonlight.