For dry, frizzy, damaged or colour-treated hair that needs smoothing, softness and shine, and for anyone who wants a smoother blow-dry without a chemical straightening service. It works on damp hair after washing and suits both home use and salon blow-dries.

Koo Koo gives a keratin-style smoothing effect in five minutes as part of an ordinary blow-dry. The three separate phases keep the actives apart until you shake the bottle, then keratin, active peptides and hyaluronic acid work together to soften the hair, strengthen it, help with the look of split ends and add shine. It is a practical option for frizzy or damaged hair between salon services.

• Wash and clean the hair thoroughly.
• Squeeze out excess water so the hair is damp.
• Shake the bottle well until the colour is uniform.
• Spray about 10 pumps onto damp hair, from roots to ends.
• Comb through for even distribution and wait 5 minutes.
• Dry with a hair dryer.

Pros:

• Five-minute leave-in step: no rinsing and no long processing time
• Three-phase formula with keratin, peptides and hyaluronic acid targets smoothness, strength and shine together
• Fits into a normal wash and blow-dry routine

Cons:

• Must be shaken well each time so the three phases mix evenly
• The result depends on blow-drying afterwards; it is not designed for air-drying
• Not a permanent straightening treatment: it gives a smoothing effect, not a chemical straightening result
• Full ingredient list is not published online