Thicken And Restore Bamboo Fibers Fortifying Mask. The hair mask glides through your locks, absorbing fast to avoid any kind of greasy, heavy residue being left behind. Infused with a blend of rich castor oil and lush neem oil, the exotic bamboo fibers in this fortifying mask attach to each strand, leaving your hair feeling thick and full and with a healthy-looking glow. Recommended for weak, brittle, thinning hair that wants volume. How to use: As a deep treatment after shampooing, apply a small amount into your palms and evenly distribute into damp hair from root to ends. For optimum results, allow the steam from the shower to penetrate each strand. Leave in for 3 minutes then rinse. Use after the shower as a leave-in treatment by applying a small amount to damp hair. Then, comb to detangle and style as usual.