Apply the ARENCIA Red Collagen Gel Mask to clean, dry skin, fitting the mask closely to the contours of your face. Leave on for 15 to 20 minutes to allow the collagen and active ingredients to penetrate deeply, then gently remove. Massage the remaining serum until fully absorbed, without rinsing, and follow with your moisturizer. Use 1 to 2 times a week for a K-Beauty “glass skin” effect.