The Organic Pharmacy 1.65 oz. Collagen Boost Mask A leave-on gel mask with Collagen, DMAE and Blackcurrant for glowing skin. The high-performing formula restores moisture, stimulates and invigorates, making this Collagen Mask a must-have for all skin types. How to Use: Apply a thin layer to cleansed skin and allow to absorb. Do not rinse off. Follow with a moisturizer. 1.65 oz./ 50 mL.