Fine, flat or limp hair that loses lift at the roots. It works on any length and on damp or dry hair, and the nozzle makes it easy to use at home without professional technique.

It is a volumizer, not a conditioning or repair product, so it will not do much for hair whose main problem is dryness or damage.

Wonder Boost is about placement. The narrow nozzle lets you part the hair and spray straight onto the roots, section by section, so the lift goes where fine hair collapses and the ends stay soft. With a flexible, brushable hold and no silicones, it gives body without the weight or stiffness of heavier root products.

On damp or dry hair, direct the nozzle close to the scalp for root lift, working in sections, or apply all over for overall volume. Blow-dry, set or let air-dry.

Pros:

• Nozzle applicator puts product at the roots instead of coating the lengths
• Flexible, brushable hold rather than a stiff or crunchy finish
• Silicone-free, so it does not weigh fine hair down
• Works on damp or dry hair

Cons:

• Contains parabens (methylparaben, ethylparaben)
• Contains fragrance and fragrance allergens
• Lift is mostly at the root; it is not a full-body texturizer
• Needs a blow-dry for the most lift