Transform thin fine hair into full thick locks with Bio Silk Thickening Shampoo. Formulated with Bio Silk’s Thickening System it infuses thinning hair with vitamin B & wheat proteins to leave each strand feeling plumper. Silk proteins contained in Bio Silk Thickening Shampoo penetrate hair to condition & create incredible shine while UV filters protect from damaging UVA/UVB rays ensuring that your hair stays thick & full. Directions of use: Apply shampoo to damp hair & work into a rich lather. Rinse thoroughly. Repeat if necessary. Use with Bio Silk Thickening Conditioner.