People with fine hair who want extra body or root lift from a leave-in product without a stiff, sticky, or crunchy hold. Positioned by the brand specifically for fine hair.

Most volumizing sprays either rely on alcohol-heavy formulas that dry hair out or waxes that leave it stiff. This one centers on Polyimide-1, a polymer that forms a light coating around each strand to add thickness and grip while staying flexible, backed by glycerin and panthenol so it doesn't feel drying. Because it's a leave-in, it's applied right before styling rather than as a rinse-out step — making it the finishing product in the Tea Tree Lemon Sage thickening routine.

This is a leave-in product — unlike the Thickening Conditioner in this same line, which IS rinsed out.

• Spray onto clean, damp hair
• Comb through evenly
• Do not rinse
• Style as desired

Pros:

• Polyimide-1 film-former adds buildable thickness and light hold without the stiffness typical of gels or hairsprays
• Leave-in, no-rinse application makes it quick to use on damp hair before styling
• Paraben-free

Cons:

• Contains several fragrance-related allergens (hexyl cinnamal, limonene, linalool, linalyl acetate) worth noting for fragrance-sensitive scalps, since it's left on the hair rather than rinsed off
• As a light-hold product, it's not built for heavy-hold or all-day humidity resistance
• Best results depend on using it alongside the matching shampoo/conditioner as part of the full system rather than alone