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Bold Refill Bags403
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Bold Hair Fibers 50g/100g Refill Bags

Keep your BOLD bottle topped up. BOLD Hair Fibers Refill Bags give you more of the fine keratin fibers you use to help conceal visible thinning.

Select your refill size and an available shade above. Reuse your existing bottle and top it up as needed.

  • One 50 g or 100 g refill bag
  • For refilling your existing hair-fibers bottle
  • Fine keratin fibers that wash out with shampoo

Price range: $10.99 through $14.75 — or subscribe to save up to 25%

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Dark Brown
Medium Brown
Light Brown
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Description

BOLD Hair Fibers · Refill bags

Keep the coverage.
Refill your BOLD.

Keep your existing hair-fibers bottle topped up. Choose a 50 g or 100 g refill bag in a shade that suits your hair.

Find your shade
Real people, BOLD results: existing hair-fiber before-and-after examples

Coverage where you need it

Fine keratin fibers cling to existing hair to help conceal visible thinning.

A natural-looking blend

Choose an available shade close to your hair color for a fuller appearance.

Simple to wash out

Temporary coverage that washes out with shampoo.

What’s included

More fibers. The same routine.

One refill bag in your selected size and shade.

50 g

50 g refill bag

A convenient refill for your everyday coverage.

100 g

100 g refill bag

A larger supply to keep your bottle topped up.

Bottle and applicator tools are separate from this refill-only product.

Before & after

See the
difference.

See how BOLD helps conceal visible thinning. Choose a photo to take a closer look.

Before-and-after example of hair-fiber coverage along a part line
Part-line coverage01 / 04

Original before-and-after photographs. Results vary by hair type and application.

Simple application

Refill. Apply.
Go BOLD.

Keep using the bottle and application method that suit your routine.

  1. Choose your refill

    Select a 50 g or 100 g bag and an available shade close to your hair color.

  2. Top up your bottle

    Use the refill bag to replenish your existing hair-fibers bottle as needed.

  3. Apply and wash out

    Shake fibers onto thinning areas, or use your own applicator pump for precision. Wash out with shampoo.

What's inside

Fine fibers. Simple ingredients.

Natural keratin and mineral-based colorant (natural iron oxide).

Color guide

Find your shade.

Use these fiber colors as a reference. Screen colors can vary; choose from the available shades in the product selector above.

Black hair fibers
Black
Dark Brown hair fibers
Dark Brown
Medium Brown hair fibers
Medium Brown
Light Brown hair fibers
Light Brown
Auburn hair fibers
Auburn
Medium Blonde hair fibers
Medium Blonde
Light Blonde hair fibers
Light Blonde

See BOLD in action

Watch how it's done.

See the application process in our hair-fiber demonstration.

Watch on YouTube
Details
Weight 0.113398 oz
Color/Shade

Black, Dark Brown, Medium Brown, Light Brown
SIZE

100g, 50g
Brand

Bold-Products
Volume

100g
GTIN-12

757510662135
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Shipping & Returns

Orders, deliveries & returns.

Clear expectations, simple steps and support when you need it.

Contact support

Getting your order to you

Next business day

Orders ship the next business day.

Ships from the U.S.

We dispatch from our U.S. warehouses based on your location.

Delivery timing

We aim for delivery in 2–3 days. Timing depends on your location and carrier.

See current shipping offers

A little peace of mind

Within 7 days

No questions asked. Contact us for a full refund and a prepaid return label.

Within 30 days

Returns are available with conditions, including used BOLD products if you are dissatisfied with the results.

Which products qualify?

After the first 7 days, used BOLD branded products can be returned within 30 days if you are dissatisfied. Other brands must be unused, unless they arrived defective or you discovered a defect after use.

Who pays for return shipping?

BOLD provides the prepaid label for 7-day returns and covers return shipping for eligible used BOLD products when you are dissatisfied with the results.

After the first 7 days, you pay return shipping if you simply change your mind and the item is unused, or if the reason is a carrier delay or another issue outside our control. Contact support to confirm the details for your return.

Need to make a return?

Read the full return policy
  1. Contact BOLD SupportReach out within the return window with your order number and what you need help with.
  2. Get your instructionsEligible requests receive a confirmation and return label within 48 hours.
  3. Pack and send it backFollow the return instructions so we can help with your refund or exchange.
Why BOLD?

Feel good about choosing BOLD.

Products we stand behind. People you can turn to.

Our BOLD promise

Everyday confidence

From hair essentials to skin and body care, BOLD brings together products that fit your routine. Explore the details, find what suits you and ask us if you need a hand choosing.

Real customer support

A question before you order? Need help with a product you already have? BOLD Support is here to listen and help you find the next step.

A promise that matters

If something is not right, reach out. Whether you need product guidance, a replacement or an eligible refund, we will work with you to help make it right.

Your satisfaction comes first.

Our promise starts with standing behind what we sell and being here when you need us. Return eligibility and shipping costs follow our published return policy.

Ask BOLD SupportView return policy