Tired under-eyes are telltale signs of jet-lag or a night spent without sleep. Formulated from biocellulose hydrogel, these masks are made to revitalize the look of puffy, exhausted-looking skin when it hasn't gotten quite enough shut-eye. How to use: Remove the backing on each single-use sheet and spread gently onto the contours of the under-eyes. Leave on for 15 to 20 minutes before peeling off. Massage excess treatment into skin. About BioRepublic Skincare Longtime friends Paolo Mentonelli and Justin Hong realized that with the wrong ingredients, sheet masks could do more harm than good to your skin. That's why they created BioRepublic a line of facial care formulated with the appearance-boosting results of their favorite masks and without the use of parabens, sulfates, pthalates or triclosan.