Completely Undetectable.
I've tried every fibre on the market, nothing comes close. It looks completely natural and holds all day, even in the rain. My confidence is definitely back! — Alex T.
Natural Cotton Fibres | 28g
- looks like your own hair
- confidence in 30 seconds
- zero side effects, guaranteed
How It Works
Premium natural cotton fibres that cling to every hair strand, even the fine, barely-visible ones, to instantly fill thinning areas and sharpen your hairline in 30 seconds. The result? Natural-looking density that stays locked in through wind, rain, sweat, and whatever your day throws at you. No harsh chemicals, no long routines.
How To Use
1. Apply on clean, dry, styled hair
2. Shake fibres over desired areas
3. Pat gently to blend
4. Seal with our Locking Spray
5. Style as desired
Ingredients
Gossypium Herbaceum Fibre,
Mineral-based Colorant (Natural Iron Oxide)
Shipping & Returns
Enjoy free tracked delivery on all orders over £60.
Our Triple Guarantee
You're fully protected with:
30-Day Money Back Guarantee
If you don't love your results, get a full refund.
Wrong Shade? Free Exchange
We'll swap it for the right colour at no extra cost.
love it or your money back
No risk. Try it with complete confidence.
How Returns Work
Simply email our UK support team at info@hairgurulondon.com within 30 days of delivery. Items must be unused and in original packaging. Once received, your refund is processed in full.
Natural Cotton Fibres | 28g
swipe to see the difference.
THESE ARE NOT ENDORSEMENTS.
worn by HOUSEHOLD NAMES.
ANIMAL-FREE. UNLIKE KERATIN.
- plant based & vegan
- naturally wraps around hair
- gentle on scalp
- undetectable
- animal proteins
- synthetic & made in lab
- risk of irritation
- visable & looks fake
JOIN THE THOUSANDS.
simple to apply.
Apply gently and build up the coverage gradually from the crown to the front.
Tap slightly to let the fibers settle onto the hair. Apply more fibers if necessary.
Use the pump to perfect the hairline. Apply in short bursts for a natural finish.
The final lock: Secure your look with 4-6 light mists. Allow a minute to dry.
Attach the pump to the hair fibres bottle and gently apply to desired areas.
Continue along the hairline to create a natural, denser look.
Use the locking spray to secure your style with 4-6 light mists. Allow a minute to dry.
Smile and enjoy your confident new look!
our 14 colours.
ONLY natural ingredients.
Levant Cotton Fiber
Gossypium Herbaceum: A pure, ancestral botanical fiber used for its superior absorbency and soft, non-irritating texture.
Natural Iron Oxide
Mineral-based colorants sourced directly from nature, providing rich, stable hues without the need for synthetic dyes.
WHAT YOU SAY.
Jo W.I got this for my partner to help with his confidence and even I was shocked at the result. I can’t believe how well the product blends and looks so natural! Great customer service and fast delivery too!
Mark S.This really is the best on the market! The colour match is spot on and how it blends in to your natural hair is brilliant. I will always buy from here until I deceive to bite the bullet and get a hair transplant
Jake B.I can’t believe how good these fibres are, tried two shades before getting the bigger pot. Was so skeptical before trying this
Simon T.Recently purchased the starter bundle and I've been using the products for a few days now. As a 34 year old man with an ever increasing forehead I needed some help. Instant results and easy to use. Thanks HG Team
Robert W.Thank you very much for my item you sent out , colour is brilliant
Frequently Asked Questions.
Our fibres are made from natural cotton using our proprietary CottonWrap™ technology. Unlike keratin-based fibres, cotton fibres naturally wrap around your existing hair strands for a denser, more undetectable finish. They’re plant-based, vegan, and gentle on even the most sensitive scalps.
Application takes about 30 seconds. Shake the bottle gently over thinning areas, starting from the crown and working forward. Tap lightly to let the fibres settle, then finish with 4–6 light mists of our Locking Spray. For precision around the hairline, use our Easy Apply Fibre Pump.
No. Our cotton fibres are completely undetectable, even in bright sunlight and under close inspection. CottonWrap™ fibres blend seamlessly with your natural hair texture. Most of our 35,000+ customers tell us nobody can tell they’re using anything at all.
Yes. Once secured with our Locking Spray, Hair Guru fibres are resistant to rain, sweat, and wind. They’ll hold up through your gym session, a rainy commute, or a long day outdoors. The fibres stay in place until you wash them out with regular shampoo.
We offer 14 shades to match virtually every hair colour. Use our free AI Colour Match Scanner — just scan your hair and get your perfect shade in 10 seconds. When in doubt, go slightly darker for the most natural result.
Our standard 28g bottle lasts most people 1–2 months with daily use. For lighter touch-ups, it can last even longer. We also offer a 100g Refill Pouch for better value and a 5g Sample Size to try before you commit.
Absolutely. Our fibres are made from natural cotton with no harsh chemicals, synthetic dyes, or irritants. They’re dermatologist-friendly and safe for daily use, even on the most sensitive skin. The formula is also vegan and cruelty-free.
We offer a 30-day money-back guarantee. If you’re not completely satisfied, contact us and we’ll sort it out. We also offer free shade exchanges if your colour isn’t quite right, and free replacements for any lost packages.
OUR OTHER PRODUCTS.
Love them, they look so natural on me, will definitely re-order!
Honestly had thinning hair problems for a while, and been using different brands of hair fibres. Finally found the ones that actually work! And with the locking spray, the fibres stay on the whole day, will buy again! Just careful, not really waterproof, without the locking spray...
Was ashamed to share, but works really well actually! Using it everyday now
When something looks too good to be true it usually is, however this is the real deal, it’s a miracle product, leaving you with thicker and a fuller head of hair! I highly recommend it.
These are the best hair fibres we’ve found , they come in lots of colours and hen you use the fixing spray they are lasting some clients 4 days! My son in law even did a crows fit session with them in and he sweats buckets but they never budged!
After seeing numerous videos on TikTok I was very sceptical about just how good this product would be, however I took the plunge and I am very glad I did. As soon as it landed on my door mat I had to have a try. I followed the easy instructions and my god was I blown away!! Please if you’re contemplating buying, just take the plunge! I am over the moon. Thanks hair guru!!
These fibres have honestly changed my life, thank you so much!
works great happy and will recommend and re order 👍
Better than the rest
Very satisfied with this item.
Good
Best product on the market cannot do without it gives me confidence to go out and have a normal life before hair guru I hardly went out thank you
I like this better than Topik, which I have used for years. It doesn’t leave spots on the scalp like Topik. I blend mine with gray to get a more natural look. Do you have gray?
Ordered wrong color, my bad…
great product
Tried other products but none are any where as good as this one (Hair Guru)
Outstanding results so easy to apply results are instant.part of my everyday routine now great
This really is the best on the market! The colour match is spot on and how it blends in to your natural hair is brilliant. I will always buy from here until I deceive to bite the bullet and get a hair transplant
Thank you very much for my item you sent out , colour is brilliant
This product is good in general, however in tbe current heat it is not waterproof. when a person sweats it starts to move and makes it drip. Its hard to wear during summer i suppose
Feel like a new man. Giving me the confidence I’ve lacked for a while. Great find
Brilliant product. After applying it. I was back to having a thatched roof on top
Very impressed
What a great product, easy to use, effective and confidence boosting!
At first I was unsure if it would work but after testing the hair fibres out and finding the right colour to match my hair, I was shocked at how well it worked, it has given me confidence in how I look now
I can go everywhere and the fibres stay on throughout the day. Love it!
Absolutely life changing, never knew I'd feel so confident in myself again. At the club, on the beach, in the gym. It's perfect everywhere and stays on.
Hair Guru has helped grow my confidence to the point I no longer worry about how my hair looks . It’s quick & easy to apply .
I was asked if I had , had a hair transplant!
Customer for life , thank you .
As a professional barber and TV & Film Makeup artist, I have used many products before, and I can highly recommend Hair Guru Thickening fibres. Such a great quality, easy to use, the result looks very natural. Easy to create perfect hairline and cover patches. Love the Locking Spray.
Big thumbs up!
Amazing product
- Choosing a selection results in a full page refresh.