BosleyMD Hair Thickening Fibers for Thinning Hair — Dark Brown 0.42 oz, Instant Fuller Natural Look

BOSVolumize Hair Thickening Fibers are lightweight keratin strands that cling to existing hair to instantly create a thicker, fuller look for thinning areas and bald spots.

These keratin-based fibers from BosleyMD use opposite electrostatic charges to bind to natural hair shafts, camouflaging low-density zones without heavy styling products. The formula is vegan and free of sulfates, parabens, and phthalates, and it resists mild wind and perspiration for everyday confidence. Ideal as a quick cosmetic fix or to enhance the appearance after a restoration procedure, the fibers blend subtly with your natural color to deliver instant volume.

How do the fibers attach and stay on my hair?

The fibers are engineered to mimic human keratin but carry a negative charge; they cling to positively charged natural hair through static attraction, forming a secure bond around each strand. This electrostatic grip helps the fibers resist displacement from light wind or sweat, offering a natural, non-greasy finish.

• Negative-charged keratin fibers that mimic real hair texture
• Static-cling adhesion to individual hair shafts
• Lightweight feel that avoids lumping or stiffness
• Wind and sweat resistant for everyday wear

Will these fibers look natural with my hair color and texture?

BOSVolumize comes in shades formulated to blend seamlessly with common hair tones; Dark Brown fills low-density spots without obvious contrast. The keratin fibers have a matte finish and fine particle size so they integrate with natural strands instead of sitting on top.

• Color-matched Dark Brown for realistic coverage
• Fine, non-shiny texture for subtle blending
• Easily layered to build desired density
• Works with a range of hair lengths and styles

How do I apply and remove the product safely?

Application is straightforward: dispense a small amount over thinning areas, gently pat to encourage fiber attachment, and style as usual. Removal is simple—regular shampooing lifts the keratin fibers without chemical stripping, making it a temporary, non-permanent solution.

• Apply to dry hair for best adhesion
• Pat or brush lightly to distribute fibers evenly
• Shampoo normally to remove at day’s end
• Safe to use post-procedure as a temporary concealer

What safety or formulation features should I know about?

The formula is free from animal-derived testing by the brand and avoids common irritants like sulfates and parabens, making it suitable for many users concerned about ingredient profiles. Because the fibers are topical and non-chemical, they do not alter the scalp or hair biologically and are intended strictly as a cosmetic coverage option.

• Vegan, sulfate-free, paraben-free, and phthalate-free
• No animal testing associated with Bosley Pro products
• Doctor recommended within Bosley Inc. product range
• Topical cosmetic—non-permanent, non-invasive coverage

Who is this for: BOSVolumize Hair Thickening Fibers suit anyone seeking quick, non-invasive coverage for thinning hair, patchy areas, or early-stage hair loss. It’s especially useful for people who want an immediate cosmetic improvement—before events, during busy mornings, or to complement surgical or non-surgical restoration outcomes—without changing their regular hair-care routine.

Ingredients

Keratin, Cetrimonium Chloride, Silica, DMDM Hydantoin, Iron Oxides (FD C Yellow No. 6, FD & C Yellow No. 5, DC Red No. 33, FD C Blue No. 1, FD & C Green No. 3, DC Green No. 5, DC Green No. 6)