The basics An ultra-light, detangling rinse containing volumizing silk fibers, that moisturizes, strengthens, and plumps strands to make fine hair look and feel fuller.  The benefits Safe for color-treated hair. The uses A must for fine, thinning, limp or flyaway hair.  The bottom line For extra body and fullness, pair with Thickening Shampoo, Thickening Serum, and Thickening Hairspray.