Lancome Visionnaire Crescendo Progressive Night Peel 1oz / 30m A dual-phase leave-on liquid night peel that provides multiple benefits in one system, resulting in accelerated results on dullness, pores, dark spots and wrinkles. This easy-to-use formula works gently to exfoliate surface cells while addressing multiple skin concerns. Inspired by fitness interval training, Visionnaire Crescendo combines two different formulas, each with their unique ingredient combination, to be used over a 28-night period as part of an interval skin training experience. Start with Phase 1 for the first 14 nights. Phase 1 is formulated with 5% bio-acids such as fruit acids and quinoa husk extract that work to reduce the appearance of pores and improve skin's texture and radiance. Then, switch to Phase 2 for the last 14 nights. Formulated with 10% derma-acids, including 0.5% salicylic acid and 9.5% pure glycolic acid, this phase reduces the appearance of fine lines, wrinkles and dark spots. The 28-night skin interval training experience can be repeated as desired.