Sibel has been supplying the hair and beauty industry for over 60 years, with professional products at low prices. All Sibel training heads have had the following procedure - hair boiled in water for 6 hours then washed in clear water. Next it is placed in an acid bath for 5-20 minutes, then washed in sodium hydroxide to neutralise the acids. Afterwards, it is then washed in clear water and rinsed in a bath of peroxide with ammonia, and again washed in clear water. The hair is then shampooed, conditioned and air dried naturally. The Cathy Training Head is made from 100% natural hair, light brown. Medium density, 230-260/cm2.