$8.49 USD Formulated with 94% plant-based ingredients and no sulfates, silicones, preservatives, soap and dyes, this 97% biodegradable and dermatologist-tested easy-to-use bar softens, repairs and revitalizes for shinier and healthier looking hair. With each bar lasting up to 40 washes and its plastic-free packaging, this shampoo gives us lustrous locks with no harsh effects on our bodies or our environment.