Keratin hair thickening fibres with biotin

Get instantly thicker hair.

Before and after. A real customer, fibres only.

THIKK contains biotin to support healthy-looking hair. Simply apply to thinning areas for instant results and confidence. Natural electrostatic charge makes the fibres cling to your existing hairs, so they look like your own hair.

Designed for everyone, in 9 shades. Made from 100% natural keratin.

Results in seconds
Washes out with shampoo
Weatherproof
Free UK delivery over £25

Shop the fibres Find your shade

Thinning too far for fibres? Look at THIKK Hair Systems.

Before and after. A real customer, fibres only.

Before THIKK. After THIKK.

Results in 30 seconds.

Real THIKK customers, fibres only. No filters. Swipe for more.

Wide parting, gone.Designed for everyone. Same fibres, 9 shades.
Fuller in seconds.Built up gently over the thinning area.
Nobody can tell.Matched to the roots for a natural finish.
Thin crown, filled.Fibres on dry hair, blended with fingertips.

Shop the fibres

9 shades

Pick the one that matches.

Match your roots. Between two? Go for the darker one. 5g £9.99, 15g £15.99, 30g £26.99.

How to use

Thirty seconds. Three steps.

Step 1 Style dry hair as usual, then lightly shake THIKK fibres onto thinning areas.
Step 2 Pat or blend the fibres with your fingertips for a natural, even look.
Step 3 Build coverage as needed. Lock & Hold spray to set it is coming soon.

What you say

Don't take our word for it.

5.0 from 11 verified reviews

★★★★★
I can’t tell you how many products I’ve tried to try thicken my hair. This is just unbelievable. I’m so happy that I found THIKK! I love that it’s hundred percent natural and it’s got biotin in! Thank you!! Subscribed !

Verified customerSubscriber
★★★★★
Great product, works really well! Got my exact colour. Would recommend.

Jordan B.Verified buyer
★★★★★
Great product, makes a real difference

A. GreatorexVerified buyer

Read all reviews

Which THIKK is right for you

Where are you at?

Three stages, three honest answers. Pick the one that sounds like you.

A thin patch or wide parting.
The hair is there, just less of it. Fibres cling to what you have and fill the gaps in 30 seconds.
Best match THIKK Hair Fibres
Shop the fibres
Thinning that's getting harder to hide.
Crown, temples or a receding hairline. Fibres, plus the spray applicator to aim them and Lock & Hold to set them.
Best match, coming soon The THIKK system
Get early access
Little or no hair left to work with.
Fibres need hair to cling to. A bespoke hair system, cut and blended by Karl, looks like it grew there.
Best match THIKK Hair Systems
Book a free consultation

Still not sure? Ask us. We will tell you straight.

THIKK Hair Systems

Your hair back. Your confidence with it.

For when fibres aren't enough. Bespoke, ultra-thin hair systems, partial or full, cut and blended by Karl so they look like they grew there.

Start with a free 30-minute consultation. No pressure, no obligation.

Book a free consultation

Private appointments. Nothing is shared without your say-so.

The THIKK system

Fibres. Applicator. Lock & Hold. Growth Oil.

Start here

Hair fibres

Instantly thicker looking hair. 9 shades, 3 sizes.

From £9.99 Coming soon

Spray applicator

Aim it where you need it. Fits 5g and 15g, or 30g. Tap for early access.

Coming soon

Lock & Hold

Sets your fibres. Holds all day. Tap for early access.

Coming soon

Growth Oil

Stronger roots. Thikker hair. Rosemary and biotin for the scalp. Tap for early access.

Now booking

Hair systems

Bespoke systems fitted by Karl. Free consultation.

Book a consultation

Honest options

Fibres, hair system or transplant?

We do the first two. Here is how all three stack up.

	THIKK Fibres	THIKK Hair System	Transplant
See a difference	In 30 seconds	From your fitting	Around 12 to 18 months
No surgery	Yes	Yes	No
Works with very little hair	No	Yes	No
Change your mind	Washes out	Removable	Permanent
Cost to start	From £9.99	Free consultation	Usually thousands

Transplant timings and costs are typical UK ranges. Speak to a clinic for your own.

Our story

Made at the chair.

THIKK started at Dickeybow, Karl's salon in Wakefield and Leeds, where clients kept asking how to make their hair look thicker. Karl and Joe built the answer in West Yorkshire, tested it on real clients and made it for everyone.

Read our story

Behind the scenes at a THIKK shoot, hair and make-up being finished in a pink Christmas set

Questions

Asked. Answered.

Anything else? Get in touch.

Will people be able to tell?

Not when the shade is right. THIKK fibres are keratin, the same protein as your hair. They cling to each strand with natural static, so they look like part of your hair instead of sitting on your scalp.

Does it stay put in wind, rain or at the gym?

Yes. It stays put all day until you wash it out with shampoo. For extra hold in wind, rain and at the gym, our Lock & Hold spray is coming soon.

Which shade should I get?

Match the colour at your roots, not the ends. If you are between two shades, pick the darker one. It blends better than going lighter. Not sure? Start with the 5g sample.

How long does a bottle last?

Used every day, a 15g lasts up to about 4 weeks and a 30g up to about 8 weeks, depending on how fine your hair is. The 5g is for trying your shade.

Do the fibres make hair grow?

No. Fibres are cosmetic. They make the hair you have look thicker the second they go on, and they wash out at night. Scalp care is coming with our Growth Oil.

Is THIKK for men or women?

Both. THIKK is designed for everyone, on all hair types.

What if fibres are not enough?

Fibres need some hair to cling to. If there is not much left in an area, a hair system is the better answer. Book a free 30 minute consultation with Karl.

How much is delivery?

Free UK delivery on orders over £25.