Ryo's Wooachae at-home hair dye kits offer brilliant colour and leaves the hair feeling healthier than before application. An easy-to-use kit offering hair salon results without having to leave your home! An herbal hair dye that delivers a lustrous grey hair coverage through a vibrant rich hair colour. Made without ammonia to minimize scalp irritation. Herbs and safflower oil keep the hair nourished and moisturized during the dyeing process, leaving your hair healthy and beautifully coloured.