Bosvolumize Hair Thickening Fibers Naturally Bond To Existing Hair With Keratin Fibers That Blend And Cover Thinning And Low Density Areas Create Thicker, Fuller-Looking Hair How To Use For Added Hold, Spray Bosleymd Styling Hairspray After Applying Hair Thickening Fibers. Bosleymd Hair Thickening Fibers Also Work Great As A Root Touch-Up In Between Color Service Product Information:Bosvolumize Hair Thickening Fibers Naturally Bond To Existing Hair With Keratin Fibers That Blend And Cover Thinning And Low Density Areas,Features:Create Thicker, Fuller-Looking Hair,Product Specification:Keratin, Cetrimonium Chloride, Dmdm Hydantoin,Silica; May Contain Ci 42090, Ci 19140, Ci 17200, Ci 15985,Product Uses:How To Use,Tips And Advice:For Added Hold, Spray Bosleymd Styling Hairspray After Applying Hair Thickening Fibers. Bosleymd Hair Thickening Fibers Also Work Great As A Root Touch-Up In Between Color Service