Brow Pro Micro by Rimmel London is a una eyebrow pencil that offers maximum precision with its sharp 0.2 mm tip that draws fine strokes for a natural result. Smudge-proof, transfer-proof, and sweat-proof, it lasts up to 24 hours and is easy to remove at the end of the day. Effects and benefits: fills in gaps and sparser areas, for naturally defined-looking eyebrows. Formula: smudge-proof, transfer-proof, and sweat-proof, lasts up to 24 hours and is easy to remove at the end of the day.