Biotin & Silica Infused Helps Plump, Fill & Make Flat Hair Bigger Instantly Thickens Fine Strands For Full Bodied Styles with Hold Sulfate Free Maximize volume with this plumping Pro-Collagen formula to thicken each hair strand. Bamboo, Biotin and Silica strengthen to transform fine, weak, flat hair into thicker, fuller, healthier hair with shine. Color safe.