tightens the skin, improves its elasticity and gives it a rejuvenated appearance works against skin weakening and sagging facial contours has an extraordinarily regenerating effect thanks to active oxygen tightens the skin, hydrates and softens it has a silky texture Test results: As part of the study on the effectiveness of the line OXY-TREAT Firmness 30 subjects participated in the test (210 subjects tested in total). Results after 30 days of use.