Anyone whose hair puffs up or loses its smoothness in humid weather, and anyone who heat-styles often and wants a protective layer over the finished look. Joico positions it for all hair types, from fine to thick and straight to curly.

It is an everyday finishing spray for home use. Hair that is stressed from frequent styling gets the most from its bond-protecting ingredients, though it is a daily protector rather than an intensive repair treatment.

Invincible is built for the end of the routine rather than the start: you mist it over hair that is already dry and styled, where it forms an invisible shield against humidity, heat and pollution for up to 24 hours. That makes it useful right after a blowout and again on day two, when a quick pass brings back softness and shine without washing.

The Defy Damage side of the formula is what separates it from a plain shine spray. Arginine helps strengthen hair bonds, and Joico's SmartRelease liposomes keep releasing rosehip oil, arginine and keratin to help repair, strengthen and protect hair from the cumulative wear of daily styling.

• Shake the can well before each use.
• Mist evenly over dry hair after styling to protect against humidity and fight frizz.
• Between washes, mist over day-old hair to refresh the style and bring back softness and shine.

Pros:

• Humidity protection that Joico rates for up to 24 hours, applied as the last step so it sits on top of the finished style
• Covers heat (up to 450°F), pollution and frizz in one mist
• Adds softness and shine with only a hint of hold, and does not weigh hair down or leave it greasy
• Doubles as a second-day refresher between washes

Cons:

• It is an aerosol with denatured alcohol and silicones; anyone avoiding either will want a different product
• Its hold is light, so it will not replace a hairspray for updos or structured styles
• It is sprayed on dry hair, so it does not replace a damp-hair styling product in your routine