paulas choice--skin perfecting 2% bha liquid salicylic acid exfoliant--facial exfoliant for blackheads, enlarged pores, wrinkles & fine lines, 4 oz bottle paula's choice skin perfecting 2% bha liquid is a unique, completely non-abrasive, leave-on liquid exfoliant for daily use on all skin types. it is our #1-selling exfoliant around the world—for good reason! it not only gently and evenly remove built-up layers of dead skin, but also increases hydration, skin smoothness, and radiance in ways you never thought possible. and, you can see the results from the first time you use it. this exfoliant has an optimal ph range of 3.2–3.8 and is formulated with additional soothing agents for enhanced benefits. it gently exfoliates built-up layers of dead skin, just like your skin did naturally when you were younger. it also effectively unclogs pores, optimizing skin renewal and clarity for remarkably smoother, perfect-looking skin, smaller pores, a refined texture, and less visible lines and wrinkles. you will see results the first time you use it! all paula’s choice products are 100% fragrance free, non-irritating, and never tested on animals.