COSMETICS, MAKE-UP & SKIN CARE. Learn about the cult beauty trend that's changing the way we think about our hair--and improving the way it looks--in the first ever book about the shampoo-free movement. Triethanolamine and propylene glycol, methylparaben, sodium laureth sulphate ...yuck. Join the growing movement of women and men everywhere who are ditching their expensive addiction to chemical-laden shampoos and going shampoo-free. At first the idea of going shampoo-free might seem radical, or even a little icky, but this beauty secret--which has long had a cult following online and been featured in Marie Claire, Elle, the Hairpin, and the Huffington Post--is not a secret any longer.