Flex

Product Overview

Flex is an American shampoo brand with a long history, and this is the Normal to Dry variant in a substantial 592ml bottle. Its selling point is a straightforward one that many conditioning shampoos struggle with: it rinses clean without leaving a film, which is what preserves body rather than flattening hair.

The formula is designed to build flexible strength from inside the hair shaft so it withstands the stress of heat styling.

Key Benefits

• Protects hair and leaves it manageable and healthy-looking
• Rinses clean without filmy build-up
• Keeps body and bounce even in oily hair
• Builds flexible strength to resist heat styling stress
• Suitable for daily use
• Large 592ml bottle

Key Features

• 592ml bottle
• Normal to Dry variant
• No filmy build-up
• For men and women
• New York product

Why Build-Up Matters

A shampoo that leaves residue makes hair feel soft on day one and lank by day three. Conditioning agents accumulate on the shaft with every wash — and the more they build up, the heavier the hair sits and the more shampoo you need to shift them, which is a loop worth staying out of.

A shampoo that rinses clean is particularly worth having for fine hair, oily scalps, and anyone using styling products daily. If your hair has already gone flat and dull despite regular washing, build-up is the usual culprit and a clarifying wash resets it.

How to Wash Hair Properly

1. Wet the hair thoroughly first. Shampoo on half-wet hair does not spread and does not lather.
2. Put the shampoo on the scalp, not on the length. The scalp is where the oil and dirt are; the ends get cleaned by the suds running down and that is enough.
3. Massage with the pads of the fingers, never the nails, for a minute or so.
4. Rinse until the water runs completely clear. Under-rinsing leaves residue that dulls hair and irritates the scalp.
5. A second, shorter lather if the hair was oiled or heavily product-laden. Otherwise one is enough.
6. Condition the mid-lengths and ends only, then rinse in cool water.

Frequently Asked Questions

Do I need a conditioner with it?

On the mid-lengths and ends if your hair is dry. The point of this shampoo is that it does not leave conditioner behind on its own, so if your hair needs conditioning it needs a conditioner.

Is it suitable for coloured hair?

It is a clean-rinsing shampoo, which means it cleans thoroughly, and thorough cleaning fades colour a little faster. Wash less often and use cool water if your hair is coloured.

How often should I wash my hair?

There is no universal answer. Oily scalps and dusty commutes suit daily or alternate-day washing; dry, curly or chemically treated hair usually does better with two or three washes a week. Medicated shampoos are the exception — follow the course on the pack rather than your habit.

Is it for men or women?

Both. Hair is hair — what matters is texture, length and condition, not who it belongs to.