For anyone keeping hair straight, whether after a keratin treatment, Brazilian blowout or Japanese straightening, or simply through regular blow-drying and flat ironing. Mon Platin says it suits all hair types, including colour-treated hair.

It is a retail spray for home styling. Its oil-free texture makes it a good choice for fine straight hair that goes limp under heavier smoothing products.

Straight styles lose their polish to two things: heat damage and humidity. Hyloren Smoother Dream Hair Spray is aimed at both. Its fine mist leaves a thin, invisible film on each strand that holds moisture in and keeps frizz down, and that layer also protects hair from the dryer and iron. Because Mon Platin made it without oils, formalin or parabens, it keeps straightened hair smooth and glossy without a greasy, weighed-down finish.

Apply before heat styling.

• On damp hair: spray evenly before blow-drying.
• On dry hair: spray before flat ironing.
• Hold 6 to 8 inches (15 to 20 cm) from the hair.
• Style as usual; do not rinse.

Pros:

• Formalin-free and oil-free, and the brand says it is safe on chemically straightened hair.
• Holds a sleek finish in humid weather, according to the brand.
• Light enough for fine hair and safe for colour-treated hair per Mon Platin.
• Mist format makes it quick to apply to damp hair before a blow-dry.

Cons:

• No maximum temperature rating is published by the brand for this spray.
• Made for straight, sleek styles; it is not designed to add volume or define curls.
• Full ingredient list not published online.