Brow Pro Micro by Rimmel London is a una eyebrow pencil that offers maximum precision with its 0.2 mm fine tip that draws thin 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 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.