If you have red hair then this is the product for you. I've been using henna on my hair for over a decade now, and using lush solid shampoo bars for about the same amount of time. This one is my favourite. There's a touch of henna in it - not enough to stain hair (or the bathtub!) red but enough to give a bit of a boost to hair that's already red or reddish. Also, the rhassoul mud helps soothe my oft-sore scalp. Like other lush shampoo bars, wet your hair and the bar and then give it a few strokes through your hair, then massage to a lather. It doesn't lather as much as liquid shampoos, or even as much as other shampoo bars, but it gets the job done and rinses easily. It leaves my hair with a nice shine that really boosts the henna glow and keeps the colour looking new for longer between henna applications. Although the viewpoints page says "discontinued", it's still available from lush online under their "retro" section.