Biotop designed it for dull, dry or lightly stressed hair that needs moisture, shine, manageability and overall condition restored. It is colour-safe, so it also suits colour-treated hair.

Very dry hair can use it every wash in place of conditioner; normal hair does best with it once a week. Fine hair should use a small amount on the ends only.

It gives treatment-level softness without treatment-level time. Many masks ask for ten minutes or more; Biotop's 911 Quinoa Hair Mask is designed to work in two to three, combining quinoa protein for strength with sunflower seed oil and vitamins for moisture and shine. That makes it realistic to use as often as dry hair actually needs it, not just on a spare evening.

• Shampoo first, ideally with 911 Quinoa Shampoo
• Place a generous amount of mask into your hands
• Distribute evenly through the hair, focusing on the mid-lengths to the ends
• Massage gently into the hair
• Leave in for 2-3 minutes, then rinse

Use as an everyday deep conditioner on hair that needs extra moisture, or once a week on normal hair.

Pros:

• Only 2-3 minutes on the hair, so it fits into a normal shower
• Flexible: a daily deep conditioner for very dry hair or a weekly treatment for normal hair
• Colour-safe; free of SLS, SLES, parabens and sodium chloride
• Two retail sizes: a 250 ml tube and a 550 ml jar

Cons:

• Silicones and rich conditioners can weigh down fine hair or build up if you never clarify
• Contains fragrance and allergens (hexyl cinnamal, linalool, citronellol, limonene, benzyl salicylate)
• A moisture treatment rather than a bond-building repair product for severely broken hair