RESIST BHA 9 for Stubborn Imperfections delivers 9% BHA in a controlled-release formula for maximum skin smoothing with noticeable results. This gel-serum works wonders to improve the appearance of tenacious skin concerns, such as enlarged pores, clogged pores, bumps, multiple signs of aging, and patches of rough, dry skin.Who is this for?RESIST BHA 9 for Stubborn Imperfections is for anyone who has struggled with persistent skin imperfections and wants enhanced results over and above the skincare products they've been using.