Fusionplex Intense Repair Mask is for people with damaged, brittle, or breakage-prone hair -- from chemical processing, heat styling, or everyday combing -- who want a quick weekly treatment rather than a daily conditioner.

This mask's silk amino acids and micronized lipids are formulated specifically to reinforce hair that's prone to breaking under everyday mechanical stress -- brushing, styling, tension -- so a short weekly treatment can help hair hold up better between washes rather than needing a longer, more involved repair routine.

Note: on Wella's own product page, these steps are mislabeled under a 'Features & Benefits' heading rather than under 'Directions' -- the steps below are the correct usage instructions regardless of where they appear on the page.

1. Apply to clean, damp hair.
2. Leave on for 5 minutes.
3. Rinse thoroughly.
4. Use as a once-a-week at-home treatment, applied after shampooing.

• Pro: Silk amino acids are a genuine, confirmed ingredient in this formula (not just a marketing name), paired with conditioning lipids to help reinforce the hair fibre
• Pro: Only a 5-minute leave-on time, so it fits into a normal wash-day routine rather than requiring an extended treatment
• Con: Contains methylparaben and propylparaben, which some people specifically avoid, along with several fragrance-related allergens (linalool, limonene, hexyl cinnamal, benzyl salicylate)
• Con: As a short-contact rinse-out mask, it's a lighter treatment than an overnight repair product, so more severely damaged hair may need it paired with the matching Fusionplex shampoo and conditioner for full effect