Made for frizz-prone hair that puffs up or turns flyaway in humid weather. Biolage lists it as best for medium to thick hair, says it suits curly hair with a loose curl pattern, and confirms the formula is safe for colour-treated hair.

It is a simple at-home leave-in, used daily after washing. Very fine hair may find a cream too heavy; tight curls and coils may want a richer curl-specific cream.

A smoothing wash only goes so far once hair dries and meets humid air. This cream stays on the hair: its micro-dosed concentrate of cold-pressed camellia oil and filtered glycerin, combined with conditioning agents that help align the cuticle, keeps frizz, static and flyaways under control through the day while adding shine and softness. It is the finishing step of the Smooth Proof cleanse, condition and prep routine, so it pairs naturally with the shampoo and conditioner but also works on its own as a daily anti-frizz leave-in.

After cleansing and conditioning, ideally with Smooth Proof Shampoo and Conditioner, apply a small amount to damp hair.

Focus on the lengths and ends.

Do not rinse. Style as usual.

Pros

• Tackles frizz, static and flyaways in one leave-in step
• Non-sticky cream that controls hair without a greasy feel
• Camellia oil helps shield hair from humidity
• Suitable for colour-treated hair and loose curls
• Current 200 ml tube uses 69% less plastic than the previous 150 ml tube, per Biolage

Cons

• Contains a silicone (amodimethicone), unlike the silicone-free Smooth Proof Conditioner
• Fragranced, with several listed fragrance allergens
• Aimed at medium to thick hair, so fine hair can feel weighed down if too much is used