This is aimed at people with fine or normal hair whose roots go flat quickly, especially if a regular volumizing spray or mousse applied through the lengths isn't solving the problem at the source. Because it's sprayed directly onto the roots rather than through the mid-lengths, it suits someone specifically chasing root lift rather than all-over texture or curl support.

It works across straight, wavy, and curly hair types, provided the underlying issue is limp or fine roots rather than heavy, coarse hair.

A lot of volumizing products are applied through the mid-lengths and ends, which doesn't help much if the actual problem is roots that fall flat within a few hours. Double Boost is sprayed directly at the root, aiming to build lift exactly where fine or limp hair tends to lose it first, and it's rated to hold that lift for up to 48 hours rather than needing a midday touch-up.

Because it also carries UV filters through its FlexPROtec complex, it's a reasonable pick if you're regularly blow-drying or heat-styling color-treated hair and want the volume step to do a little protective work too.

Shake well before use.

• Section towel-dried hair and spray Double Boost directly onto the roots.
• For extra lift, work the product through the roots with a small round brush while blow-drying.
• Alternatively, use it to support a back-combing or teasing technique at the crown.
• Style the rest of the hair as usual once the roots are set.

Pros:

• Targets the roots specifically, which is where fine or limp hair typically loses volume first
• Strong, flexible hold (4/5) rated to last up to 48 hours rather than falling flat by midday
• Includes UV filters intended to help protect color-treated hair and reduce heat-styling stress while you style
• Works across straight, wavy, and curly hair, not just one texture

Cons:

• It's an aerosol spray, so it needs to be shaken and sprayed with the can held close to the roots for accurate placement — it isn't a leave-in or brush-through product
• A 4/5 hold can feel stiff at the roots on very fine hair if overused
• Best suited to root volume specifically, not an all-over texturizer or curl definer