Prosana Silk Collagen Mask. This illuminating treatment helps reduce the appearance of fine lines and wrinkles, revealing youthful-looking skin. Instead of cotton fiber, this mask is made with pure silk! Silk amino acids, together with marine collagen and prickly pear extract, encourage a radiant, glowing complexion. For aging skin. Single use, 1-piece mask comes folded in a foil pouch. White sheet infused with colorless essence.