Hair Thickening Fibers are Keratin Proteins similar to natural hair. Hair Thickening Fibers blend with natural hair that may add density and help create thicker, fuller-looking hair. Provides instant results, can be used daily while your natural...

Easy application...Just shake, spray and go! Bosley Professional Strength Thickening Fibers are keratin fibers that bond securely to existing hair to blend and cover thinning and low density areas of hair for instant volume, thickness and...