Gielly Green
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Fred Gielly and Shai Greenberg have developed a unique salon philosophy which they practice at their first joint venture Gielly Green, in London’s Marylebone. Gielly Green is a haven of indulgent satisfaction; a place to gratify the soul.
“Our vision was of a boutique salon offering the ultimate in customer care, reverting back to an uncompromising old-school style of service. The client is alwa
This is your sign to reset the routine.
Wash. Treat. Smooth. Shine.
After weeks of sun, swims and summer styling, The One Routine brings hair back to the essentials. A simple ritual designed to leave it feeling cared for, polished and ready for what’s next.
Summer hair, reset.
POV: The One made the holiday packing list before you did.
Swimsuit, SPF, The One for Smoothness : all the essentials are covered.
For keeping hair looking smooth, polished and put-together, even when the rest of the routine is officially out of office.
Dear hair,
Hope you’re enjoying the long days, golden light and everything that comes with them.
We’re sending a little The One for SHINE your way, for smoothness, gloss and that healthy-looking finish that catches the summer light just right.
Here’s to keeping the summer glow going a little longer.
With love (and plenty of shine)
The One Hair System x
All I need is a reset.
All I need is a little less salt, chlorine and summer build-up.
All I need is… The One Routine.
A simple return to routine for scalp and hair after weeks of summer living.
Sometimes, less really is more.
14/08/2026
Summer takes a toll.
From salt water buildup to sun-stressed strands, every texture in The One System is crafted for total scalp and hair recovery.
Wash away the season, reset your strands. Which one is your favorite?
Summer glow isn’t just about skin.
Straight from the Gielly Green salon chair: a sun-kissed balayage refresh to bring back dimension, a precision cut to refine the shape, and a blow-dry to make every tone and layer shine.
Sun-soaked hair, done properly by
Late summer calls for low maintenance.
A few drops of The One for Shine seals split ends and boosts shine instantly — on damp or dry hair, zero fuss. Less styling. More shine.
High-performance cellular protection for August hair.
Formulated with Saffron, Moringa, and Rice Water, The One System delivers targeted, weightless protection against heat, UV, and seasonal damage.
Behind every product, there’s a story. Behind The One, there’s a philosophy.
Five questions with Karin: the inspiration behind The One, the ingredients she trusts, and the rituals that shape her everyday haircare.
From the first idea to a complete system, discover the story behind The One.
Karin Greenberg
06/08/2026
Do you know what The ONE smells like?
It’s a full sensory moment. Bright, zesty citrus meets delicate florals and a warm, creamy base.
Discover the signature scent profile behind The One Experience.
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Contact the business
Website
Address
42-44 George Street
London
W1U7ES
Opening Hours
| Monday | 9am - 5pm |
| Tuesday | 9am - 8pm |
| Wednesday | 9am - 6pm |
| Thursday | 9am - 8pm |
| Friday | 9am - 6pm |
| Saturday | 9am - 6pm |