Anyone who blow-dries their hair regularly and deals with frizz or slow drying time, especially in humid weather. It's applied before drying rather than after styling, so it suits people who want to shorten their blowout routine as much as people chasing a sleeker finish.

It's a consumer product with no learning curve - one pump, rub between palms, apply to damp hair - and works across hair types, though very fine hair should use a light hand since it's a concentrated silicone formula and can look weighed-down if overused.

The real difference between this and a typical anti-frizz serum is timing: it's designed to go on before the blow-dryer, not after styling, so the silicones are sealing the cuticle while heat is being applied rather than sitting on top of an already-dry style. That's what lets it double as both a time-saver and a humidity barrier - the same film that helps hair dry faster is what keeps it smooth once you're back out in the air.

• Apply to clean, damp (not soaking wet) hair before blow-drying
• Rub one pump between your palms first, then work it through from mid-lengths to ends
• Blow-dry and style as usual
• Use sparingly - it's a concentrated formula, so more product isn't better

• Cuts blow-dry time by sealing the cuticle before heat is applied, rather than just masking frizz afterward
• Lightweight enough to leave hair with a silky finish instead of a greasy one, when used sparingly
• Humidity-resistant film helps prevent frizz from creeping back in over the course of a day
• Vegan, paraben-free and gluten-free formula

• Only works as intended on damp hair before drying - it isn't a dry-hair touch-up product
• Very concentrated; using more than one pump on fine or short hair can leave it looking oily
• Contains several fragrance allergens (linalool, limonene, geraniol, citronellol, amyl cinnamal) worth checking if you have a sensitive scalp