Keratin fibers are a key structural component of hair and nails. Charged with static electricity, Bosley Professional Hair Thickening Fibers blend with your natural hair to cover up areas that are fine or thinning.
Keratin fibers charged with static electricity blend with your natural hair to cover thinning and low-density areas and they simply wash out when you shampoo.
Perfect for a cover-up between colour treatments, the fibers simply wash out when you shampoo.
Its instantly thicker hair that's easy to apply.