Finally Hair keratin hair building fibers refill 100 g — Medium Brown, instant natural density for thinning hair

Finally Hair Building Fiber Refill (100 g) in Medium Brown instantly conceals thinning areas by depositing keratin microfibers that cling to existing hair for natural-looking density.

If you want a fast, non-invasive way to reduce the appearance of thinning or small bald patches, this refill pack supplies 100 grams of charged keratin fibers formulated to blend with medium brown hair. The fibers are made to separate rather than clump, so they spread evenly across the scalp and bond to your own strands using static attraction, producing fuller-looking hair in minutes without a complicated routine.

How quickly will I see a difference after applying these fibers?

Results are immediate: most users notice significantly more coverage within a few minutes of application. The fibers adhere to existing hair and build volume without heavy residue, allowing you to style right away.

• Application typically takes under five minutes.
• Works best when some natural hair exists for the fibers to attach to.
• Pat gently after applying to settle fibers and reduce transfer.
• Finish with a fiber-hold spray for extra longevity (sold separately).

Will the medium brown shade match my hair and stay natural?

The medium brown shade is calibrated to blend with mid-tone brown roots and can be mixed with other shades for highlights or salt-and-pepper hair. For the most convincing result, match at the roots; if unsure between two colors, choose the slightly darker option.

• Available in 23 shades including five salt-and-pepper variants.
• Color chart is photo-matched to real fibers for accuracy.
• Mix shades gently to mimic highlights or gray blending.
• A darker choice usually looks more natural than a shade that's too light.

How do I apply and remove these keratin hair fibers safely?

Application is straightforward: wash and dry hair, then dispense fibers over thinning areas by shaking or tapping the refill into a suitable shaker. After setting with a light pat and optional fiber lock spray, fibers remain until you cleanse them out with shampoo.

• Use a shaker bottle for controlled dispensing (refill may not include the shaker).
• For very sparse or bald areas, use Finally Hair Prep Solution first (sold separately).
• Remove fully with a standard shampoo; fibers rinse out cleanly.
• Do not expect permanent adhesion — fibers are a temporary cosmetic solution.

Are these fibers safe and suitable for different hair types?

Finally Hair fibers are made from natural keratin, produced in ISO 9001 facilities, and labeled vegan and cruelty-free. They are designed to be gentle on the scalp and non-comedogenic, but anyone with sensitive skin should patch-test first.

• Formulated without ammonium chloride and common irritants.
• Magnetized fibers enhance styling and scalp coverage.
• Works on most hair textures when applied to existing strands.
• For best adherence on very short or absent hair, use prep products available separately.

Who is this refill pack for? This 100 g medium brown refill is aimed at people with thinning hair who want an economical supply of finishing fibers for regular use. It suits those who already use a shaker bottle or who prefer buying refills to replenish product without extra packaging. If you are seeking a quick, temporary cosmetic densifier that blends with medium brown shades and can be customized with other colors, this refill offers a substantial quantity for frequent coverage and touch-ups.

Ingredients

Colors vary for best results. May contain Keratin, Gossyplum Herbaceum, Polymer, FD&C Yellow No. 5 (CL 19140), FD&C Red #40 (Cl 16035), Black 1 (CL 28440) FD&C Blue No. 1 (CL42090), D&C Orange No. 4 (CL 15510), D&C Black No. 2 and other similar dyes.