Kiehl’s’ Nightly Refining Micro Peel Concentrate is a leave on serum, formulated to accelerate the cell turnover process revealing fresher, smoother, younger looking skin. Enriched with sustainably sourced quinoa husk extract, its powerful exfoliating properties help release dull surface skin while visibly evening skin tone and refining the feel of rough texture over time.Kiehl's Dermatologist Solutions Nightly Refining Micro Peel ConcentrateApplication: leave on overnight 30ml