Intense Charcoal Detox in 15 minutes with New XL Charcoal Mask for Men. Garnier introduces a new generation of face masks for men that infuses skin with 1 week of serum with 1 mask. Garnier Black Serum Mask is a breakthrough black tissue mask technology that offers double purifying and hydrating efficacy. Use Garnier Black Serum Mask if you have dull skin with clogged and enlarged pores. It is enriched with Charcoal, known for its ability to remove impurities. It is also enriched with pore tightening Black Algae Extracts. The serum mask will intensely hydrate and purify your skin while also tightening its pores. The sheet mask has been dermatologically tested. How to use – Unfold the mask. Apply on clean face with blue protective film facing outwards. Remove the blue film. Adjust the mask to the contours of your face. Leave it on for 15mins. Remove mask and gently massage your face with the excess serum.