Kenra markets Boosting Spray-Foam 17 as an all-over volumizer suitable for any hair type, aimed at people whose goal is root lift and overall body rather than sculpted hold or texture — it's meant to go on before the blow-dry, not after. Because it's applied to damp hair and finished with a round brush for maximum lift, it suits anyone doing their own blow-dry styling at home who wants more volume without the stiffness of a heavier mousse or gel.

The real differentiator is where it sits in a styling routine: this is a pre-blow-dry volumizer, not a finishing spray, and its resin blend is engineered to build lift at the root while drying down to a hold that still moves and brushes out, rather than the stiffer set typical of firm-hold mousses. The hydrolyzed silk and botanical extracts are there to offset the drying effect that root-lift-focused resins can otherwise have.

• Shake the can well before use.
• Apply to damp, towel-dried hair in sections, focusing on the roots for lift.
• Blow-dry the treated sections.
• For more dramatic volume, blow-dry using a round brush while lifting at the roots.

Pros:

• VP/VA copolymer plus polyacrylamide gives strong root lift and volume without the stiff, helmet-like set of a firm-hold hairspray
• Hydrolyzed silk and the botanical extract blend (sunflower, goji, green tea, lemongrass) add a conditioning layer that pure volumizing resins alone don't provide
• Foam/spray hybrid delivery distributes more evenly through damp hair at the roots than a straight liquid spray

Cons:

• Aerosol format (HFC-152a and isopentane propellant) means it's subject to shipping and air-travel restrictions
• Contains diazolidinyl urea and iodopropynyl butylcarbamate, preservatives that can be sensitizers for some users, plus benzophenone-4, a UV filter some flag as a potential irritant
• Needs to go on damp hair before blow-drying to work as intended — it isn't a finishing or touch-up product for already-dry, already-styled hair