For anyone whose smooth blowout, flat-iron style or defined curls turn frizzy the moment it's humid or rainy. It's a light-hold finisher, so it suits people who want protection and shine rather than stiffness, on any hair type, and stylists sealing a finished blowout before a client heads outside.

A regular hairspray holds shape, but it doesn't necessarily stop moisture from swelling the hair and undoing a smooth finish. Humidity Blocker+ is built around that one job: an invisible, weightless shield that keeps humidity, static and frizz out for up to a day, with just enough hold to set the style and a shine boost on top.

Shake well. Spray 8 to 10 inches (20 to 30 cm) from dry, finished hair, covering the style evenly. Layer for extra hold, and re-mist during the day if needed before heading into humid weather.

Pros:

• Rated for 24 hours of humidity protection, with instant frizz reduction
• Eliminates static and adds shine
• Light, flexible hold that doesn't make hair stiff
• Also offers thermal and pollution protection

Cons:

• Light hold (level 3) won't hold updos or heavily structured styles on its own
• Works on dry, finished hair only; it won't fix frizz that's already set in
• Aerosol, so keep it away from heat and flame