I bought this mascara because my skin and eyes are sensitive and because I found the YSL mascara I had bought only a month or so earlier always ended up smudged before lunchtime. The La Roche-Posay, however, does not budge. It also doesn't irritate, clump or go on excessively heavy. The brush is perfect for apply one or two solid coats without over doing it or making a mess. By far the best mascara I've ever used.