Made for anyone with a keratin treatment, Brazilian blowout, Japanese straightening or other chemical straightening, and for hair that is dry or damaged from heat styling. It is also safe on colour-treated hair, per the brand. A home-use weekly mask for keeping a salon smoothing result in good shape.

Two common reasons a keratin or Brazilian result fades early are dryness and harsh, sulfate-based cleansing. This mask is designed for that situation: it is SLS/SLES-free so it won't strip the treatment, and its hyaluronic acid complex rehydrates hair that chemical straightening has left brittle. If you invest in smoothing services, it is an easy weekly way to look after them.

• Wash with a sulfate-free shampoo and gently towel-dry.
• Apply evenly through damp hair, concentrating on the lengths and ends.
• Leave on for 3 to 5 minutes.
• Rinse thoroughly.
• Use 1 to 2 times a week.

Pros

• SLS/SLES-free, so it is safe to use on keratin and other straightening treatments
• Targets frizz as well as dryness, the two things that make a smoothing result look worn
• Also suits heat-damaged hair
• Only 3 to 5 minutes on the hair

Cons

• Maintains smoothness but won't straighten hair that hasn't been treated
• Very fine hair may find a rich weekly mask more than it needs
• No full ingredient list published by the brand