Salicylic Acid is a beta hydroxy acid that exfoliates the skin. This 2% treatment solution helps exfoliate the inside walls of pores to fight the appearance of blemishes and for better visible skin clarity with continued use. This formula should not be used on sensitive, peeling or compromised skin. Please refer to additional sun protection note and other warnings in provided Directions. What's in the box 1 x Salicylic Acid 2% Solution Anti-Acne Serum 30ml