Toni & Guy Volume addiction shampoo enhances volume and adds body to your hair with a weightless feel. The patented fibre strengthening system reinforces hair from within, revitalising it strand by strand. Volume addiction shampoo for fine hair formulated with wheat extract. Our unique salon formula transforms fine & flat-looking hair, giving it volume & thickness without weighing it down. From glamourous up-dos to big backcombed hair, it creates the perfect base for any volumised hair style.