Wella Professionals made this mask for damaged hair: lengths that feel brittle, rough or snap easily when you comb, brush or style them. It's a rinse-out salon-brand treatment that anyone can use at the basin or in the shower; no professional mixing or timing is involved.

It works best for people already using, or willing to add, the matching Fusion Intense Repair Shampoo and Conditioner, since Wella builds its breakage claims around the full three-step routine.

Fusion is built around breakage. Wella's Silksteel Technology blends silk amino acids with micronized lipids that penetrate the hair cortex, refilling the fibre and helping protect it from further damage, so hair holds up better to the everyday combing and styling that makes damaged lengths snap.

Wella adds a Metal Purifier to help shield hair from metals in tap water, and gives the mask a floriental woody fragrance with notes of rose, white flower and pear. Used as step three after Fusion Intense Repair Shampoo and Conditioner, it is meant to leave damaged hair smoother, shinier and more resilient.

1. Shampoo, ideally with Fusion Intense Repair Shampoo, then squeeze excess water out of the hair.
2. Apply the mask to clean, damp hair, working it through the mid-lengths and ends.
3. Leave on for 5 minutes.
4. Rinse thoroughly.

Wella positions the mask as step three of the Fusion routine, after the Intense Repair Shampoo and Conditioner.

• Pro: Silksteel Technology pairs silk amino acids with micronized lipids aimed at the hair cortex, and Wella reports up to 95% more resilience against breakage (versus a non-conditioning shampoo).
• Pro: Includes Wella's Metal Purifier to help protect hair from metals present in tap water.
• Pro: Short 5-minute leave-on time, applied to lengths and ends only, so it fits a normal wash day.
• Pro: Sold in a 150 ml jar and a 500 ml salon size, so regular users can buy the larger jar.
• Con: Contains methylparaben, propylparaben and several fragrance allergens, which some people prefer to avoid.
• Con: It's a rinse-out treatment for mid-lengths and ends only, and Wella's breakage results are measured with the full Fusion shampoo, conditioner and mask routine, so the mask on its own may do less.