Natural Solid Shampoo “Nettle & Burdock” 100g – Herbal Shampoo Bar for Stronger, Fuller-Looking Hair. Give your hair the gentle care it deserves with the Natural Nettle & Burdock Solid Shampoo Bar. Crafted with plant-based ingredients, this premium shampoo bar cleanses the hair and scalp while helping hair feel stronger, healthier, and naturally fuller.